try {
NamespaceHelper helper = new NamespaceHelper(AccessController.NAMESPACE,
AccessController.DEFAULT_PREFIX, USECASES_ELEMENT);
String[] usecaseNames = usecaseRoles.getUsecaseNames();
for (int u = 0; u < usecaseNames.length; u++) {
Element usecaseElement = helper.createElement(USECASE_ELEMENT);
helper.getDocument().getDocumentElement().appendChild(usecaseElement);
usecaseElement.setAttribute(ID_ATTRIBUTE, usecaseNames[u]);
String[] roles = usecaseRoles.getRoles(usecaseNames[u]);
for (int r = 0; r < roles.length; r++) {
Element roleElement = helper.createElement(ROLE_ELEMENT);