Bug 39244 modifiersChanged() hook not called in NewTypeWizardPage [code manipulation]
The modifiersChanged() hook in NewTypeWizardPage is not being called when a modifier radio-button is selected (public/default/private/protected), it is only being called if a check box is selected (abstract/final/static). I suspect a missing "else if" clause in typePageDialogFieldChanged() in NewTypeWizardPage is the culprit. As such am unable to extend NewTypeWizardPage and validate modifier settings (working on custom "class" wizard extension).
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/wizards/NewTypeWizardPage.java
dialog.setTitle(NewWizardMessages.getString("NewTypeWizardPage.SuperClassDialog.title")); 
		dialog.setMessage(NewWizardMessages.getString("NewTypeWizardPage.SuperClassDialog.message")); 
		dialog.setFilter(getSuperClass());
		if (dialog.open() == TypeSelectionDialog.OK) {
			return (IType) dialog.getFirstResult();
		}
		return null;
	}
	
	private void chooseSuperInterfaces() {
		IPackageFragmentRoot root= getPackageFragmentRoot();
		if (root == null) {
			return;
		}	
		IJavaProject project= root.getJavaProject();
		SuperInterfaceSelectionDialog dialog= new SuperInterfaceSelectionDialog(getShell(), getWizard().getContainer(), fSuperInterfacesDialogField, project);
		dialog.setTitle(fIsClass ? NewWizardMessages.getString("NewTypeWizardPage.InterfacesDialog.class.title") : NewWizardMessages.getString("NewTypeWizardPage.InterfacesDialog.interface.title")); 
		dialog.setMessage(NewWizardMessages.getString("NewTypeWizardPage.InterfacesDialog.message")); 
		dialog.open();
		return;
	}	
	
	
		
	
	/**
	 * Creates the new type using the entered field values.
	 * 
	 * @param monitor a progress monitor to report progress.
	 */