@Override
protected void configureGraphicalViewer()
{
super.configureGraphicalViewer();
GraphicalViewer viewer = getGraphicalViewer();
this.diagramPresentation = new DiagramPagePresentation(this.part, this.configManager, viewer.getControl().getShell());
this.diagramModel = new DiagramModel(this.diagramPresentation);
viewer.setEditPartFactory(new SapphireDiagramEditorEditPartFactory(getConfigurationManager()));
viewer.setRootEditPart(new ScalableFreeformRootEditPart()