protected void onPortletAdded(String javaClassName) {
   try {
     EntityPortlet portlet = UIFactory.createPortlet(getProject(), javaClassName);
     if (portlet == null) {
       return;
     }
     AbstractTab activeTab = getActiveOntologyTab();
     activeTab.addPortlet(portlet, activeTab.getColumnCount() - 1);
     doLayout();
   } catch (Exception e) {
     GWT.log("Problem adding portlet", e);
   }
 }