this.multiCategorizer = multiCategorizer;
this.resourceSetFactory = resourceSetFactory;
this.uncategorizableResources = resourceSetFactory.createResourceSet();
eventBus = new HandlerManager(this);
allResources.addEventHandler(new ResourceSetChangedEventHandler() {
@Override
public void onResourceSetChanged(ResourceSetChangedEvent event) {
change(event.getAddedResources(), event.getRemovedResources());