public Object execute(ExecutionEvent event) throws ExecutionException {
		ResourceSet rs = new ResourceSetImpl();
		Resource r = rs.createResource(URI.createFileURI("c:/diagram.xmi"));
		Diagram diag = Graphiti.getPeService().createDiagram(
				"my.diagramType1", "name", true);
		r.getContents().add(diag);
		try {
			r.save(null);
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		GraphitiUiInternal.getWorkbenchService().openDiagramEditor(diag,
				"my.diagramTypeProvider");
		return null;
	}

@Override
	public void init(IEditorSite site, IEditorInput input)
			throws PartInitException {
		getUpdateBehavior().createEditingDomain();

		// super.super.init(...);
		{
			setSite(site);
			setInput(input);
			getCommandStack().addCommandStackListener(this);
			getSite().getWorkbenchWindow().getSelectionService()
					.addSelectionListener(this);
			initializeActionRegistry();
		}

		getUpdateBehavior().init();
	}

	@Override
	protected void doSetInput(IEditorInput input) {
		MyEditorInput diagramEditorInput = (MyEditorInput) input;

		// determine filename
		Assert.isNotNull(input, "The IEditorInput must not be null"); //$NON-NLS-1$
		Diagram diagram = diagramEditorInput.getDiagram();

		// can happen if editor is started with invalid URI
		Assert.isNotNull(diagram, "No Diagram found for URI '" //$NON-NLS-1$
				+ "'. . See the error log for details."); //$NON-NLS-1$

		String providerId = diagramEditorInput.getProviderId();

		Assert.isNotNull(
				providerId,
				"DiagramEditorInput does not convey a Provider ID '" + diagramEditorInput //$NON-NLS-1$
						+ "'. . See the error log for details."); //$NON-NLS-1$

		// get according diagram-type-provider
		IDiagramTypeProvider diagramTypeProvider = GraphitiUi
				.getExtensionManager().createDiagramTypeProvider(providerId);
		Assert.isNotNull(
				diagramTypeProvider,
				"could not find diagram type provider for " + diagram.getDiagramTypeId()); //$NON-NLS-1$

		diagramTypeProvider.init(diagram, this);
		IConfigurationProvider configurationProvider = new ConfigurationProvider(
				this, diagramTypeProvider);
		setConfigurationProvider(configurationProvider);
		getRefreshBehavior().handleAutoUpdateAtStartup();

		registerBusinessObjectsListener();
		registerDiagramResourceSetListener();

		refreshTitle();
	}

	@Override
	public void doSave(IProgressMonitor monitor) {
		getResourceAccess().save();
	}

	@Override
	public void init(IEditorSite site, IEditorInput input)
			throws PartInitException {
		MyEditorInput diagramEditorInput = (MyEditorInput) input;
		ResourceSet resourceSet = diagramEditorInput.getDiagram().eResource()
				.getResourceSet();
		final IWorkspaceCommandStack workspaceCommandStack = new GFWorkspaceCommandStackImpl(
				new DefaultOperationHistory());

		final TransactionalEditingDomainImpl editingDomain = new TransactionalEditingDomainImpl(
				new ComposedAdapterFactory(
						ComposedAdapterFactory.Descriptor.Registry.INSTANCE),
				workspaceCommandStack, resourceSet);
		WorkspaceEditingDomainFactory.INSTANCE.mapResourceSet(editingDomain);
		getUpdateBehavior().initializeEditingDomain(editingDomain);

		// super.super.init(...);
		{
			setSite(site);
			setInput(input);
			getCommandStack().addCommandStackListener(this);
			getSite().getWorkbenchWindow().getSelectionService()
					.addSelectionListener(this);
			initializeActionRegistry();
		}

		getUpdateBehavior().init();
	}

import org.eclipse.core.commands.operations.DefaultOperationHistory;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.resource.ResourceSet;
import org.eclipse.emf.edit.provider.ComposedAdapterFactory;
import org.eclipse.emf.transaction.impl.TransactionalEditingDomainImpl;
import org.eclipse.emf.workspace.IWorkspaceCommandStack;
import org.eclipse.graphiti.mm.pictograms.Diagram;
import org.eclipse.graphiti.ui.editor.DefaultPersistencyBehavior;
import org.eclipse.graphiti.ui.editor.DefaultUpdateBehavior;
import org.eclipse.graphiti.ui.editor.DiagramEditor;
import org.eclipse.graphiti.ui.editor.DiagramEditorInput;
import org.eclipse.graphiti.ui.internal.editor.GFWorkspaceCommandStackImpl;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IEditorSite;
import org.eclipse.ui.PartInitException;

public class CustomDiagramEditor extends DiagramEditor {
	public static class CustomDiagramEditorInput extends DiagramEditorInput {
		private Diagram diagram;

		public CustomDiagramEditorInput(Diagram diag, String providerId) {
			super(URI.createFileURI("" + System.currentTimeMillis()),
					providerId);
			this.diagram = diag;
		}

		public Diagram getDiagram() {
			return diagram;
		}
	}

	private CustomDiagramEditorInput editorInput;

	@Override
	protected DefaultPersistencyBehavior createPersistencyBehavior() {
		return new DefaultPersistencyBehavior(this) {
			@Override
			public Diagram loadDiagram(URI uri) {
				return editorInput.getDiagram();
			}
		};
	}

	@Override
	protected DefaultUpdateBehavior createUpdateBehavior() {
		return new DefaultUpdateBehavior(this) {
			@Override
			protected void createEditingDomain() {
				ResourceSet resourceSet = editorInput.getDiagram().eResource()
						.getResourceSet();
				final IWorkspaceCommandStack workspaceCommandStack = new GFWorkspaceCommandStackImpl(
						new DefaultOperationHistory());

				final TransactionalEditingDomainImpl editingDomain = new TransactionalEditingDomainImpl(
						new ComposedAdapterFactory(
								ComposedAdapterFactory.Descriptor.Registry.INSTANCE),
						workspaceCommandStack, resourceSet);
				// WorkspaceEditingDomainFactory.INSTANCE.mapResourceSet(editingDomain);
				initializeEditingDomain(editingDomain);
			}
		};
	}

	@Override
	public void init(IEditorSite site, IEditorInput input)
			throws PartInitException {
		assert input instanceof CustomDiagramEditorInput;
		editorInput = (CustomDiagramEditorInput) input;
		super.init(site, input);
	}
}