ActivityManager activityManager = new ActivityManager(activityMapper,
eventBus);
activityManager.setDisplay(this.appWidget);
// Start PlaceHistoryHandler with our PlaceHistoryMapper
AppPlaceHistoryMapper historyMapper = GWT
.create(AppPlaceHistoryMapper.class);
PlaceHistoryHandler historyHandler = new PlaceHistoryHandler(
historyMapper);
historyHandler.register(placeController, eventBus, this.defaultPlace);