code: public List<Contents> getContents(String dataType) throws SQLException {
  		List<Contents> contents = queryForEq(Contents.COLUMN_DATA_TYPE,
  				dataType);
  		return contents;
  	}
docs: Get contents by data type
  
  @param dataType
  data type
  @return list of contents
  @throws SQLException
  upon query error
  @since 3.0.1