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();
+        });
+    }
+
+}

src/resources/media/main.fxml

@@ -46,7 +46,7 @@
 <?import javafx.scene.paint.Color?>
 <?import javafx.scene.text.Font?>
 
-<VBox prefHeight="600.0" prefWidth="900.0" xmlns="http://javafx.com/javafx/24.0.1" xmlns:fx="http://javafx.com/fxml/1">
+<VBox  fx:controller="lodge.TestMainFxCommandButtonEventController"  prefHeight="600.0" prefWidth="900.0" xmlns="http://javafx.com/javafx/24.0.1" xmlns:fx="http://javafx.com/fxml/1">
   <children>
     <SplitPane dividerPositions="0.11469933184855234" focusTraversable="true" prefHeight="-1.0" prefWidth="-1.0" VBox.vgrow="ALWAYS">
       <items>
@@ -66,7 +66,7 @@
                            <children>
                               <ButtonBar layoutY="71.0" prefHeight="40.0" prefWidth="129.0">
                                  <buttons>
-                                    <Button mnemonicParsing="false" prefHeight="30.0" text="Add" />
+                                    <Button fx:id="btnAdd" mnemonicParsing="false" prefHeight="30.0" text="Add" />
                                  </buttons>
                               </ButtonBar>
                            </children></AnchorPane>