public void facebookConnect(final User user, final Long facebookId) throws NameClashException {
final UserImpl user1 = (UserImpl) user;
try {
user1.setFacebookId(facebookId);
entityManager.merge(user);
entityManager.flush();
} catch (EntityExistsException e) {
user1.setFacebookId(null);
throw new NameClashException();
}
}
