/**
   * This method is called by a service to release a connection that it has been using.
   *
   * @param String sDatabaseName, the name of the database to release the connection for.
   * @param DBConnection dbcon, the connection to release.
   * @return boolean, true if the database was found, else false.
   */
  public boolean releaseConnection(String sDatabaseName, DBConnection dbcon) {

    if (htDatabases.containsKey(sDatabaseName)) {
      DBConnectionManager conSet = (DBConnectionManager) htDatabases.get(sDatabaseName);
      conSet.releaseConnection(dbcon);
      return true;
    } else return false;
  }