created GUI Main and AddParticipant

app/src/main/java/ch/zhaw/projekt2/turnierverwaltung/main/MainWindow.java

@@ -9,6 +9,9 @@ import javafx.stage.Stage;
 import java.io.IOException;
 
 public class MainWindow extends Application {
+
+
+
     @Override
     public void start(Stage primaryStage) throws Exception {
         FXMLLoader loader = new FXMLLoader(getClass().getResource("mainWindow.fxml"));
@@ -23,7 +26,7 @@ public class MainWindow extends Application {
     //Can be used to Open new Scene in same Stage.
     //This way possible to later give object to Controller
     public void startParticipand(Stage stage) {
-        FXMLLoader loader = new FXMLLoader(getClass().getResource("..\\participandAddFormular\\participandFormular.fxml"));
+        FXMLLoader loader = new FXMLLoader(getClass().getResource("../participandAddFormular/participandFormular.fxml"));
         try {
             Pane pane = loader.load();
             Scene scene = new Scene(pane);