void enter() throws IOException {
GPParser opener = myParserFactory.newParser();
ResourceManager hrManager = getHumanResourceManager();
RoleManager roleManager = getRoleManager();
TaskManager taskManager = getTaskManager();
ResourceTagHandler resourceHandler = new ResourceTagHandler(
hrManager, roleManager, myProject.getResourceCustomPropertyManager());
DependencyTagHandler dependencyHandler = new DependencyTagHandler(
opener.getContext(), taskManager, getUIFacade());
AllocationTagHandler allocationHandler = new AllocationTagHandler(
hrManager, getTaskManager(), getRoleManager());