JavaFx Разделение проекта на компоненты

public class Main extends Application {
    private RootController rootController;
    private TableController tableController;
    private TextController textController;
    @Override
    public void start(Stage primaryStage) throws Exception{
        FXMLLoader loader;
        loader = new FXMLLoader( getClass().getClassLoader().getResource("./root.fxml"));
        loader.setController( rootController = new RootController() );
        BorderPane root = (BorderPane)loader.load();
        loader = new FXMLLoader( getClass().getClassLoader().getResource("./table.fxml"));
        loader.setController( tableController = new TableController() );
        root.setLeft( loader.load() );
        loader = new FXMLLoader( getClass().getClassLoader().getResource("./text.fxml"));
        loader.setController( textController = new TextController( tableController.getTable() ) );
        root.setRight( loader.load() );
        primaryStage.setTitle("Hello World");
        primaryStage.setScene(new Scene(root, 600, 400));
        primaryStage.show();
    }
    public static void main(String[] args) {
        launch(args);
    }
}
class RootController{
    @FXML
    private void initialize() {}
}
class TableController{
    @FXML private TableView<InputObject> tableInfo;
    @FXML public TableColumn<InputObject, String> col1;
    @FXML
    private void initialize() {
        col1.setCellValueFactory(new PropertyValueFactory<>("text"));
    }
    public TableView getTable() {
        return tableInfo;
    }
}
class TextController{
    private final TableView tableInfo;
    public TextController( TableView tableInfo ) {
        this.tableInfo = tableInfo;
    }
    @FXML public TextArea inputArea;
    @FXML public Button inputButton;
    @FXML
    private void initialize() {
    }
    @FXML
    public void inputToTable() {
//        нельзя так сравнивать строки
//        if(inputArea.getText() != "") {
        if( !inputArea.getText().equals( "" ) ) { // или !inputArea.getText().isEmpty()
            tableInfo.getItems().addAll(new InputObject(inputArea.getText()));
            inputArea.clear();
        }
    }
}

<!--root.fxml-->
<BorderPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8.0.111" xmlns:fx="http://javafx.com/fxml/1"/>
<!--table.fxml-->
<TableView fx:id="tableInfo" prefHeight="400.0" prefWidth="330.0" BorderPane.alignment="CENTER" xmlns="http://javafx.com/javafx/8.0.111" xmlns:fx="http://javafx.com/fxml/1">
  <columns>
    <TableColumn fx:id="col1" prefWidth="75.0" text="Output" />
  </columns>
   <columnResizePolicy>
      <TableView fx:constant="CONSTRAINED_RESIZE_POLICY" />
   </columnResizePolicy>
</TableView>
<!--text.fxml-->
<VBox alignment="TOP_CENTER" BorderPane.alignment="CENTER" xmlns="http://javafx.com/javafx/8.0.111" xmlns:fx="http://javafx.com/fxml/1">
   <children>
      <TextArea fx:id="inputArea" prefHeight="188.0" prefWidth="270.0" />
      <Button fx:id="inputButton" onAction="#inputToTable" mnemonicParsing="false" text="Input">
         <VBox.margin>
            <Insets bottom="30.0" left="30.0" right="30.0" top="30.0" />
         </VBox.margin>
      </Button>
   </children>
</VBox>