code: private TileMatrixDao getTileMatrixDao() throws SQLException {
  		if (tileMatrixDao == null) {
  			tileMatrixDao = DaoManager.createDao(connectionSource,
  					TileMatrix.class);
  		}
  		return tileMatrixDao;
  	}
docs: Get or create a Tile Matrix DAO
  
  @return tile matrix dao
  @throws SQLException
  upon dao creation failure