src/main/java/de/hitec/nhplus/Main.java

@@ -1,7 +1,6 @@
 package de.hitec.nhplus;
 
 import de.hitec.nhplus.datastorage.ConnectionBuilder;
-
 import javafx.application.Application;
 import javafx.application.Platform;
 import javafx.fxml.FXMLLoader;
@@ -12,18 +11,35 @@ import javafx.stage.Stage;
 import java.io.IOException;
 
 /**
- * @author dominik.saeume@hmmh.ag
+ * The application main class, holding the {@link #main} entrypoint.
+ *
+ * @author Bernd Heidemann
+ * @author Dominik Säume
  */
 public class Main extends Application {
 
     private Stage primaryStage;
+
+    /**
+     * The main entry point.
+     */
+    public static void main(String[] args) {
+        launch(args);
+    }
+
+    /**
+     * Implementation of the JavaFX start hook.
+     */
     @Override
     public void start(Stage primaryStage) {
         this.primaryStage = primaryStage;
-        mainWindow();
+        executeMainApplication();
     }
 
-    public void mainWindow() {
+    /**
+     * Executes the main application.
+     */
+    private void executeMainApplication() {
         try {
             FXMLLoader loader = new FXMLLoader(Main.class.getResource("/de/hitec/nhplus/main/MainWindowView.fxml"));
             TabPane pane = loader.load();
@@ -44,7 +60,4 @@ public class Main extends Application {
         }
     }
 
-    public static void main(String[] args) {
-        launch(args);
-    }
 }

src/main/java/de/hitec/nhplus/datastorage/ConnectionBuilder.java

@@ -7,9 +7,9 @@ import java.sql.DriverManager;
 import java.sql.SQLException;
 
 /**
- * The {@link DaoFactory} allows a safe connection to the Database.
+ * The {@link DaoFactory} allows a safe connection to the database.
  *
- * @author Bernd Heidemann
+ * @author Bernd Heidemannn
  * @author Dominik Säume
  * @version 1.0
  */
@@ -21,7 +21,7 @@ public class ConnectionBuilder {
     private static Connection connection;
 
     /**
-     * @return A Thread-safe {@link Connection} to the Database.
+     * @return A thread-safe {@link Connection} to the database.
      */
     synchronized public static Connection getConnection() {
         try {
@@ -38,7 +38,7 @@ public class ConnectionBuilder {
     }
 
     /**
-     * Closes the Connection to the Database.
+     * Closes the connection to the database.
      */
     synchronized public static void closeConnection() {
         try {

src/main/java/de/hitec/nhplus/datastorage/Dao.java

@@ -4,47 +4,48 @@ import java.sql.SQLException;
 import java.util.List;
 
 /**
- * {@link Dao} is the Abbreviation of Data-Access-Object.
+ * {@link Dao} is the abbreviation for Data-Access-Object.
- * This Interface has the Basic Methods which are needed on any {@link Dao} to work as expected.
+ * This interface has the Basic Methods that are needed on any {@link Dao} to work as expected.
  *
- * @param <T> The Model for which that {@link Dao} is implemented.
+ * @param <T> The model for which that {@link Dao} is implemented.
- * @author Bernd Heidemann
+ * @author Bernd Heidemannn
  * @author Dominik Säume
  * @version 1.0
- * @implSpec The Implementations should be added to the {@link DaoFactory}.
+ * @implSpec The implementations should be added to the {@link DaoFactory}.
  */
 public interface Dao<T> {
 
     /**
-     * Create a Database Entry from a Model object.
+     * Create a database entry from a model object.
      *
-     * @param t The Model instance.
+     * @param t The model instance.
      */
     void create(T t) throws SQLException;
 
     /**
-     * Read a Database Entry to a Model object.
+     * Read a database entry to a model object.
      *
-     * @param id The ID of the Element in the Database.
+     * @param id The ID of the element in the database.
+     * @return a model instance of {@link T}.
      */
     T read(int id) throws SQLException;
 
     /**
-     * @return All Database Entries as a {@link List} of Model instances
+     * @return All database entries as a {@link List} of model instances.
      */
     List<T> readAll() throws SQLException;
 
     /**
-     * Update the Database according to the Values of the Model object.
+     * Update the database according to the values of the model object.
      *
-     * @param t The Model instance.
+     * @param t The model instance.
      */
     void update(T t) throws SQLException;
 
     /**
-     * Delete a Database Entry.
+     * Delete a database entry.
      *
-     * @param id The ID of the Element in the Database.
+     * @param id The ID of the element in the database.
      */
     void delete(int id) throws SQLException;
 }

src/main/java/de/hitec/nhplus/datastorage/DaoFactory.java

@@ -6,9 +6,9 @@ import de.hitec.nhplus.patient.database.PatientDao;
 import de.hitec.nhplus.treatment.database.TreatmentDao;
 
 /**
- * The {@link DaoFactory} is a Singleton({@link #getInstance}) which should be used to get {@link Dao}s.
+ * The {@link DaoFactory} is a singleton({@link #getInstance}) that should be used to get {@link Dao}s.
  *
- * @author Bernd Heidemann
+ * @author Bernd Heidemannn
  * @author Dominik Säume
  * @version 1.0
  */
@@ -17,13 +17,13 @@ public class DaoFactory {
     private static DaoFactory instance;
 
     /**
-     * A Private Constructor according to the Singleton Pattern.
+     * A private constructor according to the singleton pattern.
      */
     private DaoFactory() {
     }
 
     /**
-     * @return The Singleton Instance.
+     * @return The singleton instance of {@link DaoFactory}.
      */
     public static DaoFactory getInstance() {
         if (DaoFactory.instance == null) {
@@ -33,7 +33,7 @@ public class DaoFactory {
     }
 
     /**
-     * @return A new {@link TreatmentDao} Instance with a Database Connection.
+     * @return A new {@link TreatmentDao} instance with a database connection.
      * @see de.hitec.nhplus.treatment.Treatment Treatment
      */
     public TreatmentDao createTreatmentDao() {
@@ -41,7 +41,7 @@ public class DaoFactory {
     }
 
     /**
-     * @return A new {@link PatientDao} Instance with a Database Connection.
+     * @return A new {@link PatientDao} instance with a database connection.
      * @see de.hitec.nhplus.patient.Patient Patient
      */
     public PatientDao createPatientDAO() {
@@ -49,7 +49,7 @@ public class DaoFactory {
     }
 
     /**
-     * @return A new {@link NurseDao} Instance with a Database Connection.
+     * @return A new {@link NurseDao} instance with a database connection.
      * @see de.hitec.nhplus.nurse.Nurse Nurse
      */
     public NurseDao createNurseDAO() {
@@ -57,7 +57,7 @@ public class DaoFactory {
     }
 
     /**
-     * @return A new {@link MedicationDao} Instance with a Database Connection.
+     * @return A new {@link MedicationDao} instance with a database connection.
      * @see de.hitec.nhplus.medication.Medication Medication
      */
     public MedicationDao createMedicationDAO() {

src/main/java/de/hitec/nhplus/datastorage/DaoImp.java

@@ -7,30 +7,30 @@ import java.sql.SQLException;
 import java.util.List;
 
 /**
- * The {@link DaoImp} is a Generic Base Implementation of the {@link Dao},
+ * The {@link DaoImp} is a generic base implementation of the {@link Dao},
- * which should fit most use cases.
+ * that should fit most use cases.
  *
- * @param <T> The Model for which that {@link Dao} is implemented.
+ * @param <T> The model for which that {@link Dao} is implemented.
- * @author Bernd Heidemann
+ * @author Bernd Heidemannn
  * @author Dominik Säume
  * @version 1.0
- * @implSpec The Implementations should be added to the {@link DaoFactory}.
+ * @implSpec The implementations should be added to the {@link DaoFactory}.
  */
 public abstract class DaoImp<T> implements Dao<T> {
     protected final Connection connection;
 
     /**
-     * @param connection The Database Connection to use
+     * @param connection The database {@link Connection} to use.
-     * @implSpec The Connection should be Received from the {@link ConnectionBuilder}.
+     * @implSpec The {@link Connection} should be received from the {@link ConnectionBuilder}.
      */
     public DaoImp(Connection connection) {
         this.connection = connection;
     }
 
     /**
-     * Creates a new Database Entry from a Model object.
+     * Creates a new database entry from a model object.
      *
-     * @param t The Model instance.
+     * @param t The model instance.
      */
     @Override
     public void create(T t) throws SQLException {
@@ -38,9 +38,10 @@ public abstract class DaoImp<T> implements Dao<T> {
     }
 
     /**
-     * Read a Database Entry to a Model object.
+     * Read a database entry to a model object.
      *
-     * @param id The ID of the Element in the Database.
+     * @param id The ID of the element in the database.
+     * @return the model instance of type {@link T}, which was read.
      */
     @Override
     public T read(int id) throws SQLException {
@@ -53,7 +54,9 @@ public abstract class DaoImp<T> implements Dao<T> {
     }
 
     /**
-     * Read all Database Entries to a {@link List} of Model objects.
+     * Read all database entries to a {@link List} of model objects.
+     *
+     * @return a {@link List} of type {@link T} holding all database entries as model instances.
      */
     @Override
     public List<T> readAll() throws SQLException {
@@ -61,9 +64,9 @@ public abstract class DaoImp<T> implements Dao<T> {
     }
 
     /**
-     * Update the Database according to the Values of the Model object.
+     * Update the database according to the values of the model object.
      *
-     * @param t The Model instance.
+     * @param t The model instance.
      */
     @Override
     public void update(T t) throws SQLException {
@@ -71,26 +74,62 @@ public abstract class DaoImp<T> implements Dao<T> {
     }
 
     /**
-     * Delete a Database Entry.
+     * Delete a database entry.
      *
-     * @param id The ID of the Element in the Database.
+     * @param id The ID of the element in the database.
      */
     @Override
     public void delete(int id) throws SQLException {
         getDeleteStatement(id).executeUpdate();
     }
 
+    /**
+     * @param result The {@link ResultSet} from execution of the statement received from {@link #getReadByIDStatement}.
+     * @return The model instance of type {@link T}.
+     * @implSpec This will be called in {@link #read}.
+     */
     protected abstract T getInstanceFromResultSet(ResultSet result) throws SQLException;
 
-    protected abstract List<T> getListFromResultSet(ResultSet result) throws SQLException;
+    /**
-
+     * @param id The ID of the database entry to read.
-    protected abstract PreparedStatement getCreateStatement(T t) throws SQLException;
+     * @return A {@link PreparedStatement} to read a specific entry by its ID.
-
+     * @implSpec This will be called in {@link #read}.
+     * The output of the execution will be used in {@link #getInstanceFromResultSet}.
+     */
     protected abstract PreparedStatement getReadByIDStatement(int id) throws SQLException;
 
+    /**
+     * @param result The {@link ResultSet} from execution of the statement received from {@link #getReadAllStatement}.
+     * @return A {@link List} of type {@link T} holding all database entries as model instances.
+     * @implSpec This will be called in {@link #readAll}.
+     */
+    protected abstract List<T> getListFromResultSet(ResultSet result) throws SQLException;
+
+    /**
+     * @return A {@link PreparedStatement} to read all entries of this model.
+     * @implSpec This will be called in {@link #readAll}.
+     * The output of the execution will be used in {@link #getListFromResultSet}.
+     */
     protected abstract PreparedStatement getReadAllStatement() throws SQLException;
 
+    /**
+     * @param t The model instance of type {@link T} for which an entry should be created.
+     * @return a {@link PreparedStatement} which can be used to create a new database entry for the model instance.
+     * @implSpec This will be called in {@link #create}.
+     */
+    protected abstract PreparedStatement getCreateStatement(T t) throws SQLException;
+
+    /**
+     * @param t The model instance of type {@link T} for which the entry should be updated.
+     * @return a {@link PreparedStatement} which can be used to update the database entry for the model instance.
+     * @implSpec This will be called in {@link #update}.
+     */
     protected abstract PreparedStatement getUpdateStatement(T t) throws SQLException;
 
+    /**
+     * @param id The ID of the database entry which should be deleted.
+     * @return a {@link PreparedStatement} which can be used to delete the database entry.
+     * @implSpec This will be called in {@link #delete}.
+     */
     protected abstract PreparedStatement getDeleteStatement(int id) throws SQLException;
 }

src/main/java/de/hitec/nhplus/fixtures/Fixture.java

@@ -7,36 +7,36 @@ import java.sql.SQLException;
 import java.util.Map;
 
 /**
- * A Fixture is a Class, which can be used to set up a specific set of Data.
+ * A fixture is a class, which can be used to set up a specific set of data.
  *
- * @param <T> The Model for which the {@link Fixture} is implemented.
+ * @param <T> The model for which the {@link Fixture} is implemented.
  * @author Dominik Säume
  * @version 1.0
- * @implSpec The Implementations should be added to the {@link Fixtures#main}.
+ * @implSpec The implementations should be added to the {@link Fixtures#main}.
  */
 public interface Fixture<T> {
 
     /**
-     * Drop all Dependent Tables.
+     * Drop all dependent tables.
      *
-     * @param connection A Database {@link Connection}, which should be received from
+     * @param connection A database {@link Connection}, which should be received from
      *                   the {@link ConnectionBuilder#getConnection}
      * @implSpec Use {@code IF EXISTS}, to ensure that it doesn't throw an {@link Exception}.
      */
     void dropTable(Connection connection) throws SQLException;
 
     /**
-     * Set up the Empty Tables with the Schema.
+     * Set up the empty tables with the schema.
      *
-     * @param connection A Database {@link Connection}, which should be received from
+     * @param connection A database {@link Connection}, which should be received from
      *                   the {@link ConnectionBuilder#getConnection}
      */
     void setupTable(Connection connection) throws SQLException;
 
     /**
-     * Loads all Model specific Data to the Database.
+     * Loads all model specific data to the database.
      *
-     * @return A Map of Models with a {@link String} key, to be used by other {@link Fixture}
+     * @return A map of models with a {@link String} key, to be used by other {@link Fixture}
      * @implSpec The {@link de.hitec.nhplus.datastorage.Dao Dao} should be received
      * from {@link de.hitec.nhplus.datastorage.DaoFactory DaoFactory}.
      */

src/main/java/de/hitec/nhplus/fixtures/Fixtures.java

@@ -8,7 +8,7 @@ import java.sql.Connection;
 import java.util.Map;
 
 /**
- * A Class, Implementing an Entrypoint({@link #main}), for loading a Specific set of Data.
+ * A class, implementing an entrypoint({@link #main}), for loading a specific set of data.
  *
  * @author Dominik Säume
  * @version 1.0
@@ -16,7 +16,7 @@ import java.util.Map;
 public class Fixtures {
 
     /**
-     * An Entrypoint, for loading a Specific set of Data.
+     * An entrypoint, for loading a specific set of data.
      *
      * @param args unused.
      */

src/main/java/de/hitec/nhplus/fixtures/MedicationFixture.java

@@ -12,7 +12,11 @@ import java.sql.Connection;
 import java.sql.SQLException;
 import java.util.*;
 
-
+/**
+ * {@link Fixture} for {@link Medication}.
+ *
+ * @author Dominik Säume
+ */
 public class MedicationFixture implements Fixture<Medication> {
     private static final String SCHEMA = "/de/hitec/nhplus/medication/database/Medication.sql";
     private static final String INGREDIENT_SCHEMA = "/de/hitec/nhplus/medication/database/Medication_Ingredient.sql";

src/main/java/de/hitec/nhplus/fixtures/NurseFixture.java

@@ -4,6 +4,7 @@ import de.hitec.nhplus.Main;
 import de.hitec.nhplus.datastorage.DaoFactory;
 import de.hitec.nhplus.nurse.Nurse;
 import de.hitec.nhplus.nurse.database.NurseDao;
+import de.hitec.nhplus.treatment.Treatment;
 
 import java.io.InputStream;
 import java.nio.charset.StandardCharsets;
@@ -11,6 +12,11 @@ import java.sql.Connection;
 import java.sql.SQLException;
 import java.util.*;
 
+/**
+ * {@link Fixture} for {@link Nurse}.
+ *
+ * @author Dominik Säume
+ */
 public class NurseFixture implements Fixture<Nurse> {
     @Override
     public void dropTable(Connection connection) throws SQLException {

src/main/java/de/hitec/nhplus/fixtures/PatientFixture.java

@@ -13,6 +13,11 @@ import java.util.*;
 
 import static de.hitec.nhplus.utils.DateConverter.convertStringToLocalDate;
 
+/**
+ * {@link Fixture} for {@link Patient}.
+ *
+ * @author Dominik Säume
+ */
 public class PatientFixture implements Fixture<Patient> {
     @Override
     public void dropTable(Connection connection) throws SQLException {

src/main/java/de/hitec/nhplus/fixtures/TreatmentFixture.java

@@ -16,6 +16,12 @@ import java.util.*;
 import static de.hitec.nhplus.utils.DateConverter.convertStringToLocalDate;
 import static de.hitec.nhplus.utils.DateConverter.convertStringToLocalTime;
 
+
+/**
+ * {@link Fixture} for {@link Treatment}.
+ *
+ * @author Dominik Säume
+ */
 public class TreatmentFixture implements Fixture<Treatment> {
     private final Map<String, Patient> patientsByName;
     private final Map<String, Nurse> nursesByName;

src/main/java/de/hitec/nhplus/main/MainWindowController.java

@@ -11,6 +11,12 @@ import javafx.scene.layout.BorderPane;
 import java.io.IOException;
 import java.util.Objects;
 
+/**
+ * Controller for the main window of the application, which holds all tabs.
+ *
+ * @author Bernd Heidemann
+ * @author Dominik Säume
+ */
 public class MainWindowController {
     @FXML
     private TabPane mainTabPane;
@@ -42,6 +48,9 @@ public class MainWindowController {
         medicationTab.setOnSelectionChanged(event -> loadMedicationPage());
     }
 
+    /**
+     * Loads the patient page into its tab.
+     */
     private void loadPatientPage() {
         try {
             BorderPane patientsPane = FXMLLoader.load(
@@ -57,6 +66,9 @@ public class MainWindowController {
         }
     }
 
+    /**
+     * Loads the treatment page into its tab.
+     */
     private void loadTreatmentsPage() {
         try {
             BorderPane treatmentsPane = FXMLLoader.load(
@@ -72,6 +84,9 @@ public class MainWindowController {
         }
     }
 
+    /**
+     * Loads the nurse page into its tab.
+     */
     private void loadNursePage() {
         try {
             BorderPane nursePane = FXMLLoader.load(
@@ -87,6 +102,9 @@ public class MainWindowController {
         }
     }
 
+    /**
+     * Loads the medication page into its tab.
+     */
     private void loadMedicationPage() {
         try {
             BorderPane medicationPane = FXMLLoader.load(

src/main/java/de/hitec/nhplus/main/Person.java

@@ -2,6 +2,12 @@ package de.hitec.nhplus.main;
 
 import javafx.beans.property.SimpleStringProperty;
 
+/**
+ * A simple base model for a {@link Person} that can be extended.
+ *
+ * @author Bernd Heidemann
+ * @author Dominik Säume
+ */
 public abstract class Person {
     private final SimpleStringProperty firstName;
     private final SimpleStringProperty surName;

src/main/java/de/hitec/nhplus/medication/AllMedicationController.java

@@ -13,6 +13,11 @@ import javafx.scene.control.cell.PropertyValueFactory;
 import java.sql.SQLException;
 import java.util.stream.Collectors;
 
+/**
+ * The controller for viewing all {@link Medication}s.
+ *
+ * @author Dominik Säume
+ */
 public class AllMedicationController {
     @FXML
     private TableView<Medication> tableView;
@@ -34,6 +39,10 @@ public class AllMedicationController {
     private final ObservableList<Medication> medications = FXCollections.observableArrayList();
     private MedicationDao dao;
 
+    /**
+     * Initialization method that is called after the binding of all the fields.
+     */
+    @FXML
     public void initialize() {
         readAllAndShowInTableView();
 
@@ -41,16 +50,14 @@ public class AllMedicationController {
         this.columnName.setCellValueFactory(new PropertyValueFactory<>("name"));
         this.columnManufacturer.setCellValueFactory(new PropertyValueFactory<>("manufacturer"));
         this.columnIngredient.setCellValueFactory(
-                cellData -> {
+                cellData -> new SimpleStringProperty(
-                    return new SimpleStringProperty(
                         cellData
                                 .getValue()
                                 .getIngredients()
                                 .stream()
                                 .map(ingredient -> ingredient.getName())
                                 .collect(Collectors.joining("\n"))
-                    );
+                ));
-                });
         this.columnPossibleSideEffects.setCellValueFactory(new PropertyValueFactory<>("possibleSideEffects"));
         this.columnAdministrationMethod.setCellValueFactory(new PropertyValueFactory<>("administrationMethod"));
         this.columnCurrentStock.setCellValueFactory(new PropertyValueFactory<>("currentStock"));
@@ -58,6 +65,9 @@ public class AllMedicationController {
         this.tableView.setItems(this.medications);
     }
 
+    /**
+     * Internal method to read all data and set it to the table view.
+     */
     public void readAllAndShowInTableView() {
         this.dao = DaoFactory.getInstance().createMedicationDAO();
         try {

src/main/java/de/hitec/nhplus/medication/Ingredient.java

@@ -2,6 +2,13 @@ package de.hitec.nhplus.medication;
 
 import javafx.beans.property.SimpleStringProperty;
 
+/**
+ * The simple model for an {@link Ingredient}.
+ *
+ * @author Dominik Säume
+ * @implSpec This isn't a conventional model, because it isn't directly stored in the database,
+ * but it can be changed to do that, in the case that its complexity rises in the future.
+ */
 public class Ingredient {
     private final SimpleStringProperty name;
 

src/main/java/de/hitec/nhplus/medication/Medication.java

@@ -10,6 +10,11 @@ import java.util.List;
 import java.util.StringJoiner;
 import java.util.stream.Collectors;
 
+/**
+ * The model for a {@link Medication}.
+ *
+ * @author Dominik Säume
+ */
 public class Medication {
     private SimpleIntegerProperty id;
     private final SimpleStringProperty name;
@@ -19,6 +24,13 @@ public class Medication {
     private final SimpleStringProperty administrationMethod;
     private final SimpleIntegerProperty currentStock;
 
+    /**
+     * This constructor allows instantiating a {@link Medication} object,
+     * before it is stored in the database, by omitting the {@link Medication#id ID} value.
+     *
+     * @implSpec Instances created with this constructor can be directly passed to
+     * {@link de.hitec.nhplus.medication.database.MedicationDao#create MedicationDao.create}.
+     */
     public Medication(
             String name,
             String manufacturer,
@@ -35,6 +47,9 @@ public class Medication {
         this.currentStock = new SimpleIntegerProperty(currentStock);
     }
 
+    /**
+     * This constructor allows instantiating a {@link Medication} object with all existing fields.
+     */
     public Medication(
             int id,
             String name,

src/main/java/de/hitec/nhplus/medication/database/MedicationDao.java

@@ -13,6 +13,13 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
+/**
+ * The {@link MedicationDao} is an implementation of the{@link de.hitec.nhplus.datastorage.Dao Dao}
+ * for the {@link Medication} model.
+ *
+ * @author Bernd Heidemannn
+ * @author Dominik Säume
+ */
 public class MedicationDao implements Dao<Medication> {
     protected final Connection connection;
 
@@ -153,6 +160,13 @@ public class MedicationDao implements Dao<Medication> {
         preparedStatement.executeUpdate();
     }
 
+    /**
+     * Constructs a {@link Medication} object from the {@link ResultSet} obtained after executing a database query.
+     * This method is used internally to map the {@link ResultSet} data to a {@link Medication} object.
+     *
+     * @param result The {@link ResultSet} containing the data retrieved from the database.
+     * @return A {@link Medication} object constructed from the {@link ResultSet} data.
+     */
     private Medication getInstanceFromResultSet(ResultSet result) throws SQLException {
         Medication medication = new Medication(
                 result.getInt(1),

src/main/java/de/hitec/nhplus/nurse/AllNurseController.java

@@ -17,6 +17,12 @@ import javafx.scene.control.cell.TextFieldTableCell;
 
 import java.sql.SQLException;
 
+/**
+ * The controller for viewing all {@link Nurse}s.
+ *
+ * @author Dominik Säume
+ * @author Ole Kück
+ */
 public class AllNurseController {
     @FXML
     public TextField textFieldSurName;
@@ -40,6 +46,10 @@ public class AllNurseController {
     private final ObservableList<Nurse> nurses = FXCollections.observableArrayList();
     private NurseDao dao;
 
+    /**
+     * Initialization method that is called after the binding of all the fields.
+     */
+    @FXML
     public void initialize() {
         this.readAllAndShowInTableView();
 
@@ -72,15 +82,28 @@ public class AllNurseController {
         this.textFieldPhoneNumber.textProperty().addListener(inputNewNurseValidationListener);
     }
 
+    /**
+     * Internal method to read all data and set it to the table view.
+     */
     private void readAllAndShowInTableView(){
         this.nurses.clear();
         this.dao = DaoFactory.getInstance().createNurseDAO();
         try {
-            this.nurses.addAll(this.dao.readAll());
+            this.nurses.setAll(this.dao.readAll());
         }catch (SQLException exception){
             exception.printStackTrace();
         }
     }
+
+    /**
+     * Internal method that clears the text fields used for creating a new {@link Nurse}.
+     */
+    private void clearTextfields() {
+        this.textFieldFirstName.clear();
+        this.textFieldSurName.clear();
+        this.textFieldPhoneNumber.clear();
+    }
+
     @FXML
     public void handleAdd(){
         String surname=this.textFieldSurName.getText();
@@ -96,10 +119,5 @@ public class AllNurseController {
         clearTextfields();
     }
 
-    private void clearTextfields() {
-        this.textFieldFirstName.clear();
-        this.textFieldSurName.clear();
-        this.textFieldPhoneNumber.clear();
-    }
 
 }

src/main/java/de/hitec/nhplus/nurse/Nurse.java

@@ -6,10 +6,22 @@ import javafx.beans.property.SimpleStringProperty;
 
 import java.util.StringJoiner;
 
+/**
+ * The model for a {@link Nurse}.
+ *
+ * @author Dominik Säume
+ */
 public class Nurse extends Person {
     private SimpleIntegerProperty id;
     private final SimpleStringProperty phoneNumber;
 
+    /**
+     * This constructor allows instantiating a {@link Nurse} object,
+     * before it is stored in the database, by omitting the {@link Nurse#id ID} value.
+     *
+     * @implSpec Instances created with this constructor can be directly passed to
+     * {@link de.hitec.nhplus.nurse.database.NurseDao#create  NurseDao.create}.
+     */
     public Nurse(
             String firstName,
             String surName,
@@ -19,6 +31,9 @@ public class Nurse extends Person {
         this.phoneNumber = new SimpleStringProperty(phoneNumber);
     }
 
+    /**
+     * This constructor allows instantiating a {@link Nurse} object with all existing fields.
+     */
     public Nurse(
             int id,
             String firstName,

src/main/java/de/hitec/nhplus/nurse/database/NurseDao.java

@@ -10,6 +10,12 @@ import java.sql.SQLException;
 import java.util.ArrayList;
 import java.util.List;
 
+/**
+ * The {@link NurseDao} is an implementation of the {@link de.hitec.nhplus.datastorage.Dao Dao}
+ * for the {@link Nurse} model.
+ *
+ * @author Dominik Säume
+ */
 public class NurseDao extends DaoImp<Nurse> {
     public NurseDao(Connection connection) {
         super(connection);

src/main/java/de/hitec/nhplus/patient/AllPatientController.java

@@ -19,6 +19,13 @@ import java.time.LocalDate;
 
 import static de.hitec.nhplus.utils.Validator.*;
 
+/**
+ * The controller for viewing all {@link Patient}s.
+ *
+ * @author Bernd Heidemann
+ * @author Dominik Säume
+ * @author Armin Ribic
+ */
 public class AllPatientController {
 
     @FXML
@@ -53,6 +60,10 @@ public class AllPatientController {
     private final ObservableList<Patient> patients = FXCollections.observableArrayList();
     private PatientDao dao;
 
+    /**
+     * Initialization method that is called after the binding of all the fields.
+     */
+    @FXML
     public void initialize() {
         this.readAllAndShowInTableView();
 
@@ -104,6 +115,41 @@ public class AllPatientController {
         this.textFieldRoomNumber.textProperty().addListener(inputNewPatientValidationListener);
     }
 
+    /**
+     * Internal method to read all data and set it to the table view.
+     */
+    private void readAllAndShowInTableView() {
+        this.patients.clear();
+        this.dao = DaoFactory.getInstance().createPatientDAO();
+        try {
+            this.patients.setAll(this.dao.readAll());
+        } catch (SQLException exception) {
+            exception.printStackTrace();
+        }
+    }
+
+    /**
+     * Internal method that stores the changes in the database.
+     */
+    private void doUpdate(TableColumn.CellEditEvent<Patient, String> event) {
+        try {
+            this.dao.update(event.getRowValue());
+        } catch (SQLException exception) {
+            exception.printStackTrace();
+        }
+    }
+
+    /**
+     * Internal method that clears the text fields used for creating a new {@link Patient}.
+     */
+    private void clearTextfields() {
+        this.textFieldFirstName.clear();
+        this.textFieldSurName.clear();
+        this.textFieldDateOfBirth.clear();
+        this.textFieldCareLevel.clear();
+        this.textFieldRoomNumber.clear();
+    }
+
     @FXML
     public void handleOnEditFirstname(TableColumn.CellEditEvent<Patient, String> event) {
         String newFirstName = event.getNewValue();
@@ -164,25 +210,6 @@ public class AllPatientController {
         this.doUpdate(event);
     }
 
-
-    private void doUpdate(TableColumn.CellEditEvent<Patient, String> event) {
-        try {
-            this.dao.update(event.getRowValue());
-        } catch (SQLException exception) {
-            exception.printStackTrace();
-        }
-    }
-
-    private void readAllAndShowInTableView() {
-        this.patients.clear();
-        this.dao = DaoFactory.getInstance().createPatientDAO();
-        try {
-            this.patients.addAll(this.dao.readAll());
-        } catch (SQLException exception) {
-            exception.printStackTrace();
-        }
-    }
-
     @FXML
     public void handleDelete() {
         Patient selectedItem = this.tableView.getSelectionModel().getSelectedItem();
@@ -212,12 +239,4 @@ public class AllPatientController {
         readAllAndShowInTableView();
         clearTextfields();
     }
-
-    private void clearTextfields() {
-        this.textFieldFirstName.clear();
-        this.textFieldSurName.clear();
-        this.textFieldDateOfBirth.clear();
-        this.textFieldCareLevel.clear();
-        this.textFieldRoomNumber.clear();
-    }
 }

src/main/java/de/hitec/nhplus/patient/Patient.java

@@ -11,6 +11,13 @@ import java.util.ArrayList;
 import java.util.List;
 import java.util.StringJoiner;
 
+/**
+ * The model for a {@link Patient}.
+ *
+ * @author Bernd Heidemann
+ * @author Dominik Säume
+ * @author Armin Ribic
+ */
 public class Patient extends Person {
     private SimpleIntegerProperty id;
     private final SimpleStringProperty dateOfBirth;
@@ -18,6 +25,13 @@ public class Patient extends Person {
     private final SimpleStringProperty roomNumber;
     private final List<Treatment> allTreatments = new ArrayList<>();
 
+    /**
+     * This constructor allows instantiating a {@link Patient} object,
+     * before it is stored in the database, by omitting the {@link Patient#id ID} value.
+     *
+     * @implSpec Instances created with this constructor can be directly passed to
+     * {@link de.hitec.nhplus.patient.database.PatientDao#create PatientDao.create}.
+     */
     public Patient(
             String firstName,
             String surName,
@@ -31,6 +45,9 @@ public class Patient extends Person {
         this.roomNumber = new SimpleStringProperty(roomNumber);
     }
 
+    /**
+     * This constructor allows instantiating a {@link Patient} object with all existing fields.
+     */
     public Patient(
             int id,
             String firstName,

src/main/java/de/hitec/nhplus/patient/database/PatientDao.java

@@ -11,6 +11,13 @@ import java.sql.SQLException;
 import java.util.ArrayList;
 import java.util.List;
 
+/**
+ * The {@link PatientDao} is an implementation of the {@link de.hitec.nhplus.datastorage.Dao Dao}
+ * for the {@link Patient} model.
+ *
+ * @author Bernd Heidemannn
+ * @author Dominik Säume
+ */
 public class PatientDao extends DaoImp<Patient> {
 
     public PatientDao(Connection connection) {

src/main/java/de/hitec/nhplus/treatment/AllTreatmentController.java

@@ -22,6 +22,12 @@ import java.io.IOException;
 import java.sql.SQLException;
 import java.util.ArrayList;
 
+/**
+ * The controller for viewing all {@link Treatment}s.
+ *
+ * @author Bernd Heidemann
+ * @author Dominik Säume
+ */
 public class AllTreatmentController {
 
     @FXML
@@ -64,6 +70,10 @@ public class AllTreatmentController {
     private final ObservableList<String> nurseSelection = FXCollections.observableArrayList();
     private ArrayList<Nurse> nurseList;
 
+    /**
+     * Initialization method that is called after the binding of all the fields.
+     */
+    @FXML
     public void initialize() {
         readAllAndShowInTableView();
         comboBoxPatientSelection.setItems(patientSelection);
@@ -101,6 +111,9 @@ public class AllTreatmentController {
         this.createComboBoxData();
     }
 
+    /**
+     * Internal method to read all data and set it to the table view.
+     */
     public void readAllAndShowInTableView() {
         this.dao = DaoFactory.getInstance().createTreatmentDao();
         try {
@@ -110,6 +123,9 @@ public class AllTreatmentController {
         }
     }
 
+    /**
+     * Internal method to create the data set for the combobox that is used for creating a new {@link Treatment}.
+     */
     private void createComboBoxData() {
         PatientDao patientDAO = DaoFactory.getInstance().createPatientDAO();
         NurseDao nurseDao = DaoFactory.getInstance().createNurseDAO();
@@ -129,6 +145,58 @@ public class AllTreatmentController {
         }
     }
 
+    /**
+     * Internal method to get the {@link Patient} object by its surname.
+     *
+     * @see AllTreatmentController#handleComboBoxPatient
+     * @see AllTreatmentController#handleNewTreatment
+     */
+    private Patient searchInPatientList(String surname) {
+        for (Patient patient : this.patientList) {
+            if (patient.getSurName().equals(surname)) {
+                return patient;
+            }
+        }
+        return null;
+    }
+
+    /**
+     * Internal method to get the {@link Nurse} object by its surname.
+     *
+     * @see AllTreatmentController#handleNewTreatment
+     */
+    private Nurse searchInNurseList(String surname) {
+        for (Nurse nurse : this.nurseList) {
+            if (nurse.getSurName().equals(surname)) {
+                return nurse;
+            }
+        }
+        return null;
+    }
+
+    /**
+     * Method to save the changes to a {@link Treatment}.
+     */
+    protected void updateTreatment(Treatment treatment) {
+        TreatmentDao dao = DaoFactory.getInstance().createTreatmentDao();
+        try {
+            dao.update(treatment);
+        } catch (SQLException exception) {
+            exception.printStackTrace();
+        }
+    }
+
+    /**
+     * Method to create a new {@link Treatment}.
+     */
+    public void createTreatment(Treatment treatment) {
+        TreatmentDao dao = DaoFactory.getInstance().createTreatmentDao();
+        try {
+            dao.create(treatment);
+        } catch (SQLException exception) {
+            exception.printStackTrace();
+        }
+    }
 
     @FXML
     public void handleComboBoxPatient() {
@@ -154,23 +222,41 @@ public class AllTreatmentController {
         }
     }
 
-    private Patient searchInPatientList(String surname) {
+    /**
-        for (Patient patient : this.patientList) {
+     * Internal method to create a {@link TreatmentModalController TreatmentModal}.
-            if (patient.getSurName().equals(surname)) {
+     *
-                return patient;
+     * @param treatment The {@link Treatment} which should be edited. Set null to create a new one.
-            }
+     * @param title     The Title of the created modal.
-        }
+     * @param patient   The {@link Patient} whose {@link Treatment} this is.
-        return null;
+     * @param nurse     The {@link Nurse} who did the {@link Treatment}.
-    }
+     */
+    public void treatmentWindow(Treatment treatment, String title, Patient patient, Nurse nurse) {
+        try {
+            FXMLLoader loader = new FXMLLoader(
+                    Main.class.getResource("/de/hitec/nhplus/treatment/TreatmentModal.fxml")
+            );
+            BorderPane pane = loader.load();
+            Scene scene = new Scene(pane);
+            Stage stage = new Stage();
 
-    private Nurse searchInNurseList(String surname) {
+            TreatmentModalController controller = loader.getController();
-        for (Nurse nurse : this.nurseList) {
+            controller.initialize(
-            if (nurse.getSurName().equals(surname)) {
+                    this,
-                return nurse;
+                    stage,
+                    treatment,
+                    patient,
+                    nurse
+            );
+
+            stage.setScene(scene);
+            stage.setTitle(title);
+            stage.setResizable(true);
+            stage.setAlwaysOnTop(true);
+            stage.showAndWait();
+        } catch (IOException exception) {
+            exception.printStackTrace();
         }
     }
-        return null;
-    }
 
     @FXML
     public void handleDelete() {
@@ -210,94 +296,24 @@ public class AllTreatmentController {
             return;
         }
 
-        newTreatmentWindow(patient, nurse);
+        treatmentWindow(null, "NHPlus - Neue Behandlung", patient, nurse);
     }
 
     @FXML
     public void handleMouseClick() {
         tableView.setOnMouseClicked(event ->
         {
-            if (event.getClickCount() != 2 || (tableView.getSelectionModel().getSelectedItem() == null)) {
+            if (event.getClickCount() == 2 && (tableView.getSelectionModel().getSelectedItem() != null)) {
-                return;
-            }
                 int index = this.tableView.getSelectionModel().getSelectedIndex();
                 Treatment treatment = this.treatments.get(index);
-            treatmentWindow(treatment, treatment.getNurse());
+                treatmentWindow(
-        });
-    }
-
-    public void newTreatmentWindow(Patient patient, Nurse nurse) {
-        try {
-            FXMLLoader loader = new FXMLLoader(
-                    Main.class.getResource("/de/hitec/nhplus/treatment/TreatmentModal.fxml")
-            );
-            BorderPane pane = loader.load();
-            Scene scene = new Scene(pane);
-            Stage stage = new Stage();
-
-            TreatmentModalController controller = loader.getController();
-            controller.initialize(
-                    this,
-                    stage,
-                    null,
-                    patient,
-                    nurse
-            );
-
-            stage.setScene(scene);
-            stage.setTitle("NHPlus - Neue Behandlung");
-            stage.setResizable(true);
-            stage.setAlwaysOnTop(true);
-            stage.showAndWait();
-        } catch (IOException exception) {
-            exception.printStackTrace();
-        }
-    }
-
-    public void treatmentWindow(Treatment treatment, Nurse nurse) {
-        try {
-            FXMLLoader loader = new FXMLLoader(
-                    Main.class.getResource("/de/hitec/nhplus/treatment/TreatmentModal.fxml")
-            );
-            BorderPane pane = loader.load();
-            Scene scene = new Scene(pane);
-            Stage stage = new Stage();
-
-            TreatmentModalController controller = loader.getController();
-            PatientDao pDao = DaoFactory.getInstance().createPatientDAO();
-            controller.initialize(
-                    this,
-                    stage,
                         treatment,
-                    pDao.read(treatment.getPatient().getId()),
+                        "NHPlus - Behandlung",
-                    nurse
+                        treatment.getPatient(),
+                        treatment.getNurse()
                 );
+            }
+        });
 
-            stage.setScene(scene);
-            stage.setTitle("NHPlus - Behandlung");
-            stage.setResizable(true);
-            stage.setAlwaysOnTop(true);
-            stage.showAndWait();
-        } catch (IOException | SQLException exception) {
-            exception.printStackTrace();
-        }
-    }
-
-    public void createTreatment(Treatment treatment) {
-        TreatmentDao dao = DaoFactory.getInstance().createTreatmentDao();
-        try {
-            dao.create(treatment);
-        } catch (SQLException exception) {
-            exception.printStackTrace();
-        }
-    }
-
-    public void updateTreatment(Treatment treatment) {
-        TreatmentDao dao = DaoFactory.getInstance().createTreatmentDao();
-        try {
-            dao.update(treatment);
-        } catch (SQLException exception) {
-            exception.printStackTrace();
-        }
     }
 }

src/main/java/de/hitec/nhplus/treatment/Treatment.java

@@ -11,6 +11,12 @@ import java.time.LocalDate;
 import java.time.LocalTime;
 import java.util.StringJoiner;
 
+/**
+ * The model for a {@link Treatment}.
+ *
+ * @author Bernd Heidemann
+ * @author Dominik Säume
+ */
 public class Treatment {
     private SimpleIntegerProperty id;
     private final SimpleObjectProperty<Patient> patient;
@@ -21,8 +27,22 @@ public class Treatment {
     private final SimpleStringProperty description;
     private final SimpleStringProperty remarks;
 
-    public Treatment(Patient patient, Nurse nurse, LocalDate date, LocalTime begin,
+    /**
-                     LocalTime end, String description, String remarks) {
+     * This constructor allows instantiating a {@link Treatment} object,
+     * before it is stored in the database, by omitting the {@link Treatment#id ID} value.
+     *
+     * @implSpec Instances created with this constructor can be directly passed to
+     * {@link de.hitec.nhplus.treatment.database.TreatmentDao#create TreatmentDao.create}.
+     */
+    public Treatment(
+            Patient patient,
+            Nurse nurse,
+            LocalDate date,
+            LocalTime begin,
+            LocalTime end,
+            String description,
+            String remarks
+    ) {
         this.patient = new SimpleObjectProperty<>(patient);
         this.nurse = new SimpleObjectProperty<>(nurse);
         this.date = new SimpleObjectProperty<>(date);
@@ -32,8 +52,19 @@ public class Treatment {
         this.remarks = new SimpleStringProperty(remarks);
     }
 
-    public Treatment(int id, Patient patient, Nurse nurse, LocalDate date, LocalTime begin,
+    /**
-                     LocalTime end, String description, String remarks) {
+     * This constructor allows instantiating a {@link Treatment} object with all existing fields.
+     */
+    public Treatment(
+            int id,
+            Patient patient,
+            Nurse nurse,
+            LocalDate date,
+            LocalTime begin,
+            LocalTime end,
+            String description,
+            String remarks
+    ) {
         this.id = new SimpleIntegerProperty(id);
         this.patient = new SimpleObjectProperty<>(patient);
         this.nurse = new SimpleObjectProperty<>(nurse);

src/main/java/de/hitec/nhplus/treatment/TreatmentModalController.java

@@ -14,6 +14,11 @@ import java.time.LocalTime;
 
 import static de.hitec.nhplus.utils.Validator.*;
 
+/**
+ * The controller for creating and editing a specific {@link Treatment}.
+ *
+ * @author Dominik Säume
+ */
 public class TreatmentModalController {
     @FXML
     private Label labelNurseName;
@@ -40,6 +45,9 @@ public class TreatmentModalController {
     private Treatment treatment;
     private boolean isNewTreatment = false;
 
+    /**
+     * Initialization method that is called after the binding of all the fields.
+     */
     public void initialize(
             AllTreatmentController controller,
             Stage stage,
@@ -109,6 +117,9 @@ public class TreatmentModalController {
 
     }
 
+    /**
+     * Internal method to show the data in the view.
+     */
     private void showData() {
         this.labelNurseName.setText(nurse.getSurName());
         this.labelFirstName.setText(patient.getFirstName());
@@ -149,8 +160,4 @@ public class TreatmentModalController {
     public void handleCancel() {
         stage.close();
     }
-
-    public Treatment getTreatment() {
-        return treatment;
-    }
 }

src/main/java/de/hitec/nhplus/treatment/database/TreatmentDao.java

@@ -2,6 +2,7 @@ package de.hitec.nhplus.treatment.database;
 
 import de.hitec.nhplus.datastorage.DaoFactory;
 import de.hitec.nhplus.datastorage.DaoImp;
+import de.hitec.nhplus.patient.Patient;
 import de.hitec.nhplus.nurse.Nurse;
 import de.hitec.nhplus.treatment.Treatment;
 import de.hitec.nhplus.utils.DateConverter;
@@ -13,6 +14,13 @@ import java.sql.SQLException;
 import java.util.ArrayList;
 import java.util.List;
 
+/**
+ * The {@link TreatmentDao} is an implementation of the {@link de.hitec.nhplus.datastorage.Dao Dao}
+ * for the {@link Treatment} model.
+ *
+ * @author Bernd Heidemannn
+ * @author Dominik Säume
+ */
 public class TreatmentDao extends DaoImp<Treatment> {
 
     public TreatmentDao(Connection connection) {
@@ -74,6 +82,13 @@ public class TreatmentDao extends DaoImp<Treatment> {
         return list;
     }
 
+    /**
+     * Retrieves a list of {@link Treatment}s associated with a specific
+     * {@link Patient#id patient ID} from the database.
+     *
+     * @param patientId The {@link Patient#id ID} of the {@link Patient} whose {@link Treatment}s are to be retrieved.
+     * @return A {@link List} of {@link Treatment} objects associated with the specified {@link Patient} ID.
+     */
     public List<Treatment> readTreatmentsByPatient(int patientId) throws SQLException {
         final String SQL = "SELECT * FROM treatment WHERE patientId = ?";
         PreparedStatement statement = this.connection.prepareStatement(SQL);
@@ -82,6 +97,13 @@ public class TreatmentDao extends DaoImp<Treatment> {
         return getListFromResultSet(result);
     }
 
+    /**
+     * Retrieves a list of {@link Treatment}s associated with a specific
+     * {@link Nurse#id patient ID} from the database.
+     *
+     * @param nurseId The {@link Nurse#id ID} of the {@link Nurse} whose {@link Treatment}s are to be retrieved.
+     * @return A {@link List} of {@link Treatment} objects associated with the specified {@link Nurse} ID.
+     */
     public List<Treatment> readTreatmentsByNurse(int nurseId) throws SQLException {
         final String SQL = "SELECT * FROM treatment WHERE nurseId = ?";
         PreparedStatement statement = this.connection.prepareStatement(SQL);

src/main/java/de/hitec/nhplus/utils/DateConverter.java

@@ -4,23 +4,44 @@ import java.time.LocalDate;
 import java.time.LocalTime;
 import java.time.format.DateTimeFormatter;
 
+/**
+ * A utility class that holds utility methods for date conversion.
+ *
+ * @author Bernd Heidemann
+ */
 public class DateConverter {
 
     private static final String DATE_FORMAT = "yyyy-MM-dd";
     private static final String TIME_FORMAT = "HH:mm";
 
+    /**
+     * @param date A date {@link String} in the format: yyyy-MM-dd.
+     * @return The converted date {@link String} as {@link LocalDate}.
+     */
     public static LocalDate convertStringToLocalDate(String date) {
         return LocalDate.parse(date, DateTimeFormatter.ofPattern(DATE_FORMAT));
     }
 
+    /**
+     * @param time A time {@link String} in the format: HH:mm.
+     * @return The converted time {@link String} as {@link LocalTime}.
+     */
     public static LocalTime convertStringToLocalTime(String time) {
         return LocalTime.parse(time, DateTimeFormatter.ofPattern(TIME_FORMAT));
     }
 
+    /**
+     * @param date A {@link LocalDate} which should be converted to a {@link String}.
+     * @return The converted {@link LocalDate} in the format: yyy-MM-dd.
+     */
     public static String convertLocalDateToString(LocalDate date) {
         return date.format(DateTimeFormatter.ofPattern(DATE_FORMAT));
     }
 
+    /**
+     * @param time A {@link LocalTime} which should be converted to a {@link String}.
+     * @return The converted {@link LocalTime} in the format: HH:mm.
+     */
     public static String convertLocalTimeToString(LocalTime time) {
         return time.format(DateTimeFormatter.ofPattern(TIME_FORMAT));
     }

src/main/java/de/hitec/nhplus/utils/Validator.java

@@ -5,17 +5,34 @@ import javafx.scene.control.Alert;
 import java.time.LocalDate;
 import java.time.LocalTime;
 
-public class Validator
+/**
-{
+ * A utility class for validating all kinds of data.
-    public static void showValidationError(String type){
+ *
+ * @author Dominik Säume
+ * @author Ole Kück
+ */
+public class Validator {
+
+    /**
+     * Shows a modal with a specific validation error.
+     *
+     * @param type The type for which a validation error should be shown as {@link String}.
+     */
+    public static void showValidationError(String type) {
         Alert alert = new Alert(Alert.AlertType.ERROR);
         alert.setTitle("Error");
         alert.setHeaderText(null);
         alert.setContentText("Invalid " + type + " !");
         alert.showAndWait();
     }
+
+    /**
+     * Validate that a {@link String} is a valid date.
+     *
+     * @param text The date {@link String} to validate.
+     */
     public static boolean isValidDate(String text) {
-        if(text.isBlank()){
+        if (text.isBlank()) {
             return false;
         }
         try {
@@ -25,8 +42,14 @@ public class Validator
         }
         return true;
     }
+
+    /**
+     * Validate that a {@link LocalDate} is a valid date for storage in the database.
+     *
+     * @param date The {@link LocalDate} to validate.
+     */
     public static boolean isValidDate(LocalDate date) {
-        if(date == null){
+        if (date == null) {
             return false;
         }
         try {
@@ -36,21 +59,34 @@ public class Validator
         }
         return true;
     }
-    public static boolean isValidTime(String text){
+
-        if(text.isBlank()){
+    /**
+     * Validate that a {@link String} is a valid time.
+     *
+     * @param text The time {@link String} to validate.
+     */
+    public static boolean isValidTime(String text) {
+        if (text.isBlank()) {
             return false;
         }
         try {
             DateConverter.convertStringToLocalTime(text);
-        }catch (Exception exception){
+        } catch (Exception exception) {
             return false;
         }
         return true;
     }
-    public static boolean isValidTimeRange(String start, String end){
+
-        if(
+    /**
+     * Validate that two time {@link String}s are a valid time range.
+     *
+     * @param start The starting time {@link String}.
+     * @param end   The ending time {@link String}.
+     */
+    public static boolean isValidTimeRange(String start, String end) {
+        if (
                 !isValidTime(start) || !isValidTime(end)
-        ){
+        ) {
             return false;
         }
         LocalTime startTime = DateConverter.convertStringToLocalTime(start);
@@ -59,24 +95,57 @@ public class Validator
 
     }
 
+    /**
+     * Validate that a {@link String} is a valid description.
+     *
+     * @param text The {@link String} to validate.
+     */
     public static boolean isValidDescription(String text) {
         return !text.isBlank();
     }
-    public static boolean isValidFirstName(String text){
+
-        return !text.isBlank();
+    /**
-    }
+     * Validate that a {@link String} is a valid first name.
-    public static boolean isValidSurName(String text){
+     *
-        return !text.isBlank();
+     * @param text The {@link String} to validate.
-    }
+     */
-    public static boolean isValidPhoneNumber(String text){
+    public static boolean isValidFirstName(String text) {
-        return !text.isBlank();
-    }
-    public static boolean isValidCareLevel(String text){
-        return !text.isBlank();
-    }
-    public static boolean isValidRoomNumber(String text){
         return !text.isBlank();
     }
 
+    /**
+     * Validate that a {@link String} is a valid surname.
+     *
+     * @param text The {@link String} to validate.
+     */
+    public static boolean isValidSurName(String text) {
+        return !text.isBlank();
+    }
+
+    /**
+     * Validate that a {@link String} is a valid phone number.
+     *
+     * @param text The {@link String} to validate.
+     */
+    public static boolean isValidPhoneNumber(String text) {
+        return !text.isBlank();
+    }
+
+    /**
+     * Validate that a {@link String} is a valid care level.
+     *
+     * @param text The {@link String} to validate.
+     */
+    public static boolean isValidCareLevel(String text) {
+        return !text.isBlank();
+    }
+
+    /**
+     * Validate that a {@link String} is a valid room number.
+     *
+     * @param text The {@link String} to validate.
+     */
+    public static boolean isValidRoomNumber(String text) {
+        return !text.isBlank();
+    }
 }
-