code: @Override
      public void close() {
          if(jdbcReader != null) {
              try {
                  jdbcReader.close();
              } catch(Exception e) {
                  LOG.error("Unable to close jdbcReader", e);
              }
          }
          if(jdbcWriter != null) {
              try {
                  jdbcWriter.close();
              } catch(Exception e) {
                  LOG.error("Unable to close jdbcWriter", e);
              }
          }
      }
docs: {@inheritDoc}