created Class Factory and refactoring of MainWindow.java

app/src/main/resources/ch/zhaw/projekt2/turnierverwaltung/participantAddFormular/participantFormular.fxml

@@ -17,7 +17,7 @@
 <?import javafx.scene.layout.VBox?>
 <?import javafx.scene.text.Font?>
 
-<HBox alignment="CENTER" VBox.vgrow="ALWAYS" xmlns:fx="http://javafx.com/fxml/1" fx:controller="ch.zhaw.projekt2.turnierverwaltung.main.participandAddFormular.participantFormularController">
+<HBox alignment="CENTER" VBox.vgrow="ALWAYS" xmlns:fx="http://javafx.com/fxml/1" fx:controller="ch.zhaw.projekt2.turnierverwaltung.main.participantAddFormular.participantFormularController">
    <children>
       <VBox alignment="TOP_CENTER" prefHeight="331.0" prefWidth="308.0" HBox.hgrow="ALWAYS">
          <children>

app/src/main/resources/ch/zhaw/projekt2/turnierverwaltung/tournamentList/tournamentList.fxml

@@ -31,7 +31,7 @@
                         <Insets />
                     </VBox.margin>
                 </ListView>
-                <Button fx:id="openBtn" mnemonicParsing="false" onAction="#openTournier" text="Öffnen">
+                <Button fx:id="openBtn" mnemonicParsing="false" onAction="#openTournament" text="Öffnen">
                     <VBox.margin>
                         <Insets bottom="20.0" top="40.0" />
                     </VBox.margin>