fix checkstyle errors in audio, model and controller packages

src/main/java/edu/ntnu/idi/idatt2003/gruppe42/Millions.java

@@ -1,20 +1,33 @@
 package edu.ntnu.idi.idatt2003.gruppe42;
 
-import edu.ntnu.idi.idatt2003.gruppe42.Controller.GameController;
-import edu.ntnu.idi.idatt2003.gruppe42.Controller.PopupsController;
-import edu.ntnu.idi.idatt2003.gruppe42.Controller.ViewControllers.DesktopViewController;
-import edu.ntnu.idi.idatt2003.gruppe42.Controller.ViewControllers.StartViewController;
-import edu.ntnu.idi.idatt2003.gruppe42.Model.Difficulty;
-import edu.ntnu.idi.idatt2003.gruppe42.Model.GameFactory;
-import edu.ntnu.idi.idatt2003.gruppe42.Model.Player;
-import edu.ntnu.idi.idatt2003.gruppe42.View.Views.DesktopView;
-import edu.ntnu.idi.idatt2003.gruppe42.View.Views.StartView;
+import edu.ntnu.idi.idatt2003.gruppe42.controller.GameController;
+import edu.ntnu.idi.idatt2003.gruppe42.controller.PopupsController;
+import edu.ntnu.idi.idatt2003.gruppe42.controller.viewcontrollers.DesktopViewController;
+import edu.ntnu.idi.idatt2003.gruppe42.controller.viewcontrollers.StartViewController;
+import edu.ntnu.idi.idatt2003.gruppe42.model.Difficulty;
+import edu.ntnu.idi.idatt2003.gruppe42.model.GameFactory;
+import edu.ntnu.idi.idatt2003.gruppe42.model.Player;
+import edu.ntnu.idi.idatt2003.gruppe42.view.views.DesktopView;
+import edu.ntnu.idi.idatt2003.gruppe42.view.views.StartView;
 import java.nio.file.Path;
 import javafx.application.Application;
 import javafx.scene.Scene;
 import javafx.stage.Stage;
 
-/** JavaFX application entry point. */
+/**
+ * Main JavaFX application entry point for the Millions game.
+ *
+ * <p>This class is responsible for:
+ * <ul>
+ *   <li>Launching the JavaFX application</li>
+ *   <li>Initializing the start screen</li>
+ *   <li>Starting and resetting game sessions</li>
+ *   <li>Switching between StartView and DesktopView</li>
+ *   <li>Managing global game state lifecycle</li>
+ * </ul>
+ *
+ * <p>It acts as the top-level coordinator between views and controllers.
+ */
 public class Millions extends Application {
 
   private Scene scene;
@@ -25,7 +38,11 @@ public class Millions extends Application {
   private DesktopView desktopView;
   private DesktopViewController desktopViewController;
 
-  /** Start method. */
+  /**
+   * Initializes and displays the start screen when the application launches.
+   *
+   * @param stage the primary JavaFX stage
+   */
   @Override
   public void start(final Stage stage) {
     StartView startView = installStartView();
@@ -38,19 +55,35 @@ public void start(final Stage stage) {
     stage.show();
   }
 
-  /** Begins a new game session. */
-  public void initGame(final String username, final Difficulty difficulty, Path userSelectedPath, PopupsController popupsController) {
+  /**
+   * Initializes a new game session using the selected settings.
+   *
+   * <p>This includes creating the player, starting the game controller,
+   * and switching the scene to the desktop view.
+   *
+   * @param username the player name
+   * @param difficulty selected game difficulty
+   * @param userSelectedPath path to stock data file
+   * @param popupsController controller managing popups
+   */
+  public void initGame(final String username, final Difficulty difficulty,
+                       Path userSelectedPath, PopupsController popupsController) {
     player = GameFactory.createPlayer(username, difficulty);
     gameController = new GameController();
     gameController.startGame();
 
-    desktopViewController = new DesktopViewController(player, gameController, userSelectedPath, popupsController);
+    desktopViewController = new DesktopViewController(player, gameController,
+            userSelectedPath, popupsController);
     desktopViewController.setOnGameOver(this::resetGame);
     desktopView = desktopViewController.getDesktopView();
     scene.setRoot(desktopView.getRoot());
   }
 
-  /** Centralised reset path. */
+  /**
+   * Resets the game back to the start screen.
+   *
+   * <p>Stops the running game controller and clears all active state.
+   */
   public void resetGame() {
     if (gameController != null) {
       gameController.stopGame();
@@ -64,22 +97,24 @@ public void resetGame() {
     scene.setRoot(startView.getRoot());
   }
 
-  /** Builds a fresh StartView. */
+  /**
+   * Creates and initializes a fresh StartView instance.
+   *
+   * @return a new StartView connected to its controller
+   */
   private StartView installStartView() {
     StartView startView = new StartView();
     new StartViewController(this, startView);
     return startView;
   }
 
-  /** Stop method. */
+  /**
+   * Stops the application and terminates any running game session.
+   */
   @Override
   public void stop() {
     if (gameController != null) {
       gameController.stopGame();
     }
   }
-
-  public static void main(final String[] args) {
-    launch(args);
-  }
 }