code: private void resolveIncompleteTransactions() throws SQLException {
  
        switch(transactionState) {
           case COMPLETED:
              //All we know for certain is that at least one commit/rollback was called. Do nothing.
              break;
           case STARTED:
              //At least one statement was created with auto-commit false & no commit/rollback.
              //Follow the default policy.
              if(conn != null && openStatements.size() > 0) {
                 switch(incompleteTransactionPolicy) {
                    case REPORT:
                       throw new SQLException("Statement closed with incomplete transaction", JDBConnection.SQLSTATE_INVALID_TRANSACTION_STATE);
                    case COMMIT:
                       if(!conn.isClosed()) {
                          conn.commit();
                       }
                       break;
                    case ROLLBACK:
                       if(!conn.isClosed()) {
                          conn.rollback();
                       }
                 }
              }
              break;
        }
     }
docs: Attempt to deal with any transaction problems.
  @throws SQLException on invalid state.