Added some javadoc comments to GUI

src/GUI/GUIController.java

@@ -5,13 +5,22 @@ import javafx.fxml.FXML;
 import javafx.scene.control.Label;
 
 public class GUIController {
-    int pressed;
+    private int pressed;
 
     //put @FXML to let the fxml file know that it can use this label,
-    // ind of the same as with @Test in jUnit tests
+    //kind of the same as with @Test in jUnit tests
+
+    /**
+     *the label to be edited by pressing the button
+     */
     @FXML
     private Label txtLabel;
 
+    /**
+     * increments the counter when the button is presssed
+     * @param event an event that happens (button is clicked)
+     * @throws Exception
+     */
     public void incrementLabel(ActionEvent event) throws Exception {
 //        System.out.println("pressed button");
         pressed++;

src/GUI/GUIMain.java

@@ -8,10 +8,19 @@ import javafx.stage.Stage;
 
 public class GUIMain extends Application {
 
+    /**
+     * launches the stage
+     * @param args
+     */
     public static void main(String[] args) {
         launch(args);
     }
 
+    /**
+     *
+     * @param primaryStage the stage to be started
+     * @throws Exception when the fxml file can't be found
+     */
     @Override
     public void start(Stage primaryStage) throws Exception {
         //link fxml file

src/GUI/LoginController.java

@@ -28,6 +28,12 @@ public class LoginController {
     @FXML
     private Button loginbutton;
 
+    /**
+     * redirects to the main stage when the login credentials are correct
+     * @param event the entered username and password, and clicking the button
+     * @throws Exception
+     * @author Sem van der Hoeven
+     */
     public void Login(ActionEvent event) throws Exception {
         //if the entered username and password are correct
         if (usertext.getText().equals("user") && passwordField.getText().equals("pass")) {