code: protected void execute(DatabaseOperation operation, DataSetSource dataSetSource) {
  		IDatabaseConnection dbconn = null;
  		try {
  			dbconn = connectionCreator.create();
  			operation.execute(dbconn, findDataSet(dataSetSource));
  		} catch (Exception e) {
  			throw new IllegalStateException(
  					"It's not possible to execute DbUnit operation: " 
  							+ e.getMessage(), e);
  		} finally {
  			connectionCreator.close(dbconn);
  		}
  	}
docs: Executes DbUnit <code>operation</code> on dataset
  <code>dataSetSource</code>.
  
  @param operation
  the DBUnit operation
  @param dataSetSource
  the dataset to be used by this operation