/**
   * Adds the ratings stats to the database. Also notifies the appropriate model listeners.
   *
   * @param ratingsStats the ratings stats
   * @return the ratings stats that was added
   */
  @Indexable(type = IndexableType.REINDEX)
  @Override
  public RatingsStats addRatingsStats(RatingsStats ratingsStats) {
    ratingsStats.setNew(true);

    return ratingsStatsPersistence.update(ratingsStats);
  }