updates

src/main/java/lodge/TestMainFx.java

@@ -11,7 +11,7 @@ public class TestMainFx extends Application {
     public void start(Stage primaryStage) {
         try {
             primaryStage.setTitle("Lodge ReservationSystem");
-            Parent root = FXMLLoader.load(getClass().getClassLoader().getResource("main.fxml"));          
+            Parent root = FXMLLoader.load(getClass().getClassLoader().getResource("main.fxml"));
             Scene scene = new Scene(root, 800, 600);
             primaryStage.setScene(scene);
             primaryStage.show();
@@ -23,5 +23,4 @@ public class TestMainFx extends Application {
     public static void main(String[] args) {
         launch(args);
     }
-
 }

src/main/java/lodge/TestMainFxCommandButtonEventController.java

@@ -0,0 +1,20 @@
+package lodge;
+
+import javafx.application.Platform;
+import javafx.fxml.FXML;
+import javafx.scene.control.Button;
+
+public class TestMainFxCommandButtonEventController {
+
+    @FXML
+    private Button btnAdd;
+
+    @FXML
+    private void initialize() {
+
+        btnAdd.setOnAction((ev) -> {
+            Platform.exit();
+        });
+    }
+
+}