java.lang.NullPointerException
	at org.eclipse.gef.mvc.fx.parts.ITransformableContentPart.setVisualTransform(ITransformableContentPart.java:94)
	at com.durr.ecopro.editor.diagram.parts.OperatorPart.doRefreshVisual(OperatorPart.java:51)

    @Override
    protected void doRefreshVisual(final OperatorVisual visual) {
        final OperatorRepresentation operator = getContent();
        visual.setName(operator.getOperator().getName());

        visual.setPrefSize(operator.getBounds().getWidth(), operator.getBounds().getHeight());
        visual.getParent().layout();

        setVisualTransform(getContentTransform());
    }

    @Override
    public Affine getContentTransform() {
        final Rectangle bounds = getContent().getBounds();
        return new Affine(new Translate(bounds.getX(), bounds.getY()));
    }

    @Override
    public void setContentTransform(final Affine totalTransform) {
        // storing the new position
        final Rectangle bounds = getContent().getBounds().getCopy();
        bounds.setX(totalTransform.getTx());
        bounds.setY(totalTransform.getTy());
        getContent().setBounds(bounds);
    }

public class DiagramModule extends MvcFxModule {

    @Override
    protected void configure() {
        super.configure();

        bindIContentPartFactory();

        bindOperatorPartAdapters(AdapterMaps.getAdapterMapBinder(binder(), OperatorPart.class));
    }

    protected void bindOperatorPartAdapters(final MapBinder<AdapterKey<?>, Object> adapterMapBinder) {
        // provides a hover feedback to the shape, used by the HoverBehavior
        AdapterKey<?> role = AdapterKey.role(DefaultHoverFeedbackPartFactory.HOVER_FEEDBACK_GEOMETRY_PROVIDER);
        adapterMapBinder.addBinding(role).to(ShapeOutlineProvider.class);

        // provides a selection feedback to the shape
        role = AdapterKey.role(DefaultSelectionFeedbackPartFactory.SELECTION_FEEDBACK_GEOMETRY_PROVIDER);
        adapterMapBinder.addBinding(role).to(ShapeBoundsProvider.class);

        // support moving nodes via mouse drag
        adapterMapBinder.addBinding(AdapterKey.defaultRole()).to(TransformPolicy.class);
        adapterMapBinder.addBinding(AdapterKey.defaultRole()).to(TranslateSelectedOnDragHandler.class);
    }

    protected void bindIContentPartFactory() {
        binder().bind(IContentPartFactory.class).to(AnalysisDiagramPartFactory.class);
    }

    @Override
    protected void bindAbstractContentPartAdapters(final MapBinder<AdapterKey<?>, Object> adapterMapBinder) {
        super.bindAbstractContentPartAdapters(adapterMapBinder);

        // binding the HoverOnHoverPolicy to every part
        // if a mouse is moving above a part it is set i the HoverModel
        adapterMapBinder.addBinding(AdapterKey.defaultRole()).to(HoverOnHoverHandler.class);

        // add the focus and select policy to every part, listening to clicks
        // and changing the focus and selection model
        adapterMapBinder.addBinding(AdapterKey.defaultRole()).to(FocusAndSelectOnClickHandler.class);
    }

    @Override
    protected void bindIRootPartAdaptersForContentViewer(final MapBinder<AdapterKey<?>, Object> adapterMapBinder) {
        super.bindIRootPartAdaptersForContentViewer(adapterMapBinder);

        // binding a Hover Behavior to the root part. it will react to
        // HoverModel changes and render the hover part
        adapterMapBinder.addBinding(AdapterKey.defaultRole()).to(HoverBehavior.class);
    }

}