/**
  * @return User_ForgeUGroup
  * @throws User_UserGroupNameInvalidException
  */
 public function createForgeUGroup($name, $description)
 {
     $user_group_id = $this->dao->createForgeUGroup($name, $description);
     if (!$user_group_id) {
         throw new User_UnableToCreateUserGroupException();
     }
     return new User_ForgeUGroup($user_group_id, $name, $description);
 }