private ProjectController projectController;
public AttributeContollerImpl() {
projectController = Lookup.getDefault().lookup(ProjectController.class);
projectController.addWorkspaceListener(new WorkspaceListener() {
public void initialize(Workspace workspace) {
AttributeModel m = workspace.getLookup().lookup(AttributeModel.class);
if (m == null) {
workspace.add(new IndexedAttributeModel());