private void updateControls() {
    if (isMakeClassParameter()) {
      String classParameterName = getClassParameterName();
      if (classParameterName == null) {
        setOKActionEnabled(false);
      }
      else {
        setOKActionEnabled(PsiNameHelper.getInstance(myProject).isIdentifier(classParameterName.trim()));
      }
    }
    else
      setOKActionEnabled(true);

    if(myClassParameterNameInputField != null) {
      myClassParameterNameInputField.setEnabled(isMakeClassParameter());
    }

    if(myParameterPanel != null) {
      myParameterPanel.setEnabled(myMakeFieldParameters.isSelected());
    }
  }
private void updateControls()