protected void saveSettings(IDialogSettings settings) {
    ISecurePreferences preferences = getPreferences(settings.getName());
    if (preferences == null) {
      // only in case it is not possible to create secured storage in
      // default location -> in that case do not persist settings
      return;
    }

    try {
      preferences.putBoolean(S_SIGN_JARS, fButton.getSelection(), true);
      preferences.put(S_KEYSTORE, fKeystoreText.getText().trim(), true);
      preferences.put(S_ALIAS, fAliasText.getText().trim(), true);
      preferences.put(S_PASSWORD, fPasswordText.getText().trim(), true);
      preferences.put(S_KEYPASS, fKeypassText.getText().trim(), true);

      // bug387565 - for keys which are starting with this bugfix to be
      // stored
      // in secured storage, replace value in settings with empty string
      // to avoid keeping sensitive info in plain text
      String[] obsoleted = new String[] {S_KEYSTORE, S_ALIAS, S_PASSWORD, S_KEYPASS};
      for (String key : obsoleted) {
        if (settings.get(key) != null) {
          settings.put(key, ""); // $NON-NLS-1$
        }
      }
    } catch (StorageException e) {
      PDEPlugin.log(
          "Failed to store JarSigning settings in secured preferences store"); //$NON-NLS-1$
    }
  }