@Override
  protected void execInitForm() throws ProcessingException {
    
    // For every field...
    for (IFormField field : getAllFields()) {
      field.addPropertyChangeListener("value", validationListener);
      field.addPropertyChangeListener("empty", validationListener);
    }

    // PropertyChangeListener for the activation of the Ok Button
       addPropertyChangeListener("saveNeeded", new PropertyChangeListener() {
      @Override
      public void propertyChange(PropertyChangeEvent event) {
        if (event.getNewValue().equals(false)) {
          getOkButton().setEnabledGranted(false);
        }
        else {
          getOkButton().setEnabledPermission(new UpdateStammdatenBibPermission());
        }
      }
    });
  }

@Override
protected boolean execIsSaveNeeded() throws ProcessingException {
  boolean b = super.execIsSaveNeeded();
  if (b == false && getTable().getCheckedRows().length > 0) {
    b = true;
  }
  return b;
}