JavaFX 8, controllers inheritance

问题:

I have some sort of problem during migration from javafx 2.2 to javafx 8; Javafx 8 doesn't support static @FXML elements.

I have the following situation (code is simplified):

Parent controller:

public abstract class ParentController implements Initializable {

@FXML
protected Label parentLabel;

@Override
public void initialize(URL location, ResourceBundle resources) {
    // do smth
}

}

Child Controller (there is not only one child):

public class ChildController extends ParentController {

@Override
public void initialize(URL location, ResourceBundle resources) {
    super.initialize(location, resources); 

    parentLabel.setText("text");
}

}

In previous version of this code parentLabel was static and it worked fine. But now I have NullPointerException while trying to setText on label.

I'm looking for the simplest solution in this situation.

UPD 1.

child fxml:

<AnchorPane id="" fx:id="apDentalClinics" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="590.0" prefWidth="1200.0" style="" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/8" fx:controller="com.package.ChildController">
<children>
    //Something here, except our lable
</children>
</AnchorPane>