code: @Override
  	public ResultSet foreignKeyCheck() {
  		ResultSet resultSet = query("PRAGMA foreign_key_check", null);
  		try {
  			if (!resultSet.next()) {
  				resultSet.close();
  				resultSet = null;
  			}
  		} catch (SQLException e) {
  			throw new GeoPackageException(
  					"Foreign key check failed on database: " + getName(), e);
  		}
  		return resultSet;
  	}
docs: {@inheritDoc}