@Override
	public IAddFeature getAddFeature(IAddContext context) {
		if (context instanceof IAddConnectionContext) {
			return new AddWrittenByFeature(this);
		}
		else if (context.getNewObject() instanceof Author){
			return new AddAuthorFeature(this);
		}
		else if (context.getNewObject() instanceof Book){
			return new AddBookFeature(this);
		}
		// TODO Auto-generated method stub
		return super.getAddFeature(context);
	}

public Object[] create(ICreateContext context) {
		String newAuthorName = ExampleUtil.askString("Insert author name",
				"Provide a name for the new author", "NewAuthor");

		Author author = GraphitilibraryFactory.eINSTANCE.createAuthor();

		// Add model element to resource.
		// We add the model element to the resource of the diagram for
		// simplicity's sake. Normally, a customer would use its own
		// model persistence layer for storing the business model separately.
		getDiagram().eResource().getContents().add(author);
		author.setName(newAuthorName);

		addGraphicalRepresentation(context, author);

		return new Object[] { author };

	}