/**
	 * Adds new Role
	 *
	 * @param           $name
	 * @param Role|NULL $parent
	 * @param bool      $flush
	 *
	 * @return Role|bool
	 */
	public function addRole($name, Role $parent = NULL, $flush = FALSE)
	{
		if ( ! $this->findRoleByName( $name ) ) {
			$role = new Role( $name, $parent );
			$this->em->persist( $role );
			if ( $flush ) $this->em->flush();

			return $role;
		}

		return FALSE;
	}