code: protected void handleOperation(OperationFault op, Exception e) throws DatabaseEngineException {
          if (!eh.proceed(op, e)) {
              throw new DatabaseEngineException("An error occurred adding the entity.", e);
          }
      }
docs: Controls if the given faulty operation must be silenced or not. The decision can be controlled by an external party
  using for that matter the {@link #setExceptionHandler(ExceptionHandler)} method to provide a
  specific implementation.
  
  @param op The operation that originated the exception.
  @param e  The exception.
  @throws DatabaseEngineException If the faulty operation must stop the execution.