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
* an interface is to be created
	 * @param pageName the wizard page's name
	 */
	public NewTypeWizardPage(boolean isClass, String pageName) {
		super(pageName);
		fCreatedType= null;
		
		fIsClass= isClass;
		
		TypeFieldsAdapter adapter= new TypeFieldsAdapter();
		
		fPackageDialogField= new StringButtonStatusDialogField(adapter);
		fPackageDialogField.setDialogFieldListener(adapter);
		fPackageDialogField.setLabelText(NewWizardMessages.getString("NewTypeWizardPage.package.label")); 
		fPackageDialogField.setButtonLabel(NewWizardMessages.getString("NewTypeWizardPage.package.button")); 
		fPackageDialogField.setStatusWidthHint(NewWizardMessages.getString("NewTypeWizardPage.default")); 
				
		fEnclosingTypeSelection= new SelectionButtonDialogField(SWT.CHECK);
		fEnclosingTypeSelection.setDialogFieldListener(adapter);
		fEnclosingTypeSelection.setLabelText(NewWizardMessages.getString("NewTypeWizardPage.enclosing.selection.label")); 
		
		fEnclosingTypeDialogField= new StringButtonDialogField(adapter);
		fEnclosingTypeDialogField.setDialogFieldListener(adapter);
		fEnclosingTypeDialogField.setButtonLabel(NewWizardMessages.getString("NewTypeWizardPage.enclosing.button")); 
		
		fTypeNameDialogField= new StringDialogField();
		fTypeNameDialogField.setDialogFieldListener(adapter);
		fTypeNameDialogField.setLabelText(NewWizardMessages.getString("NewTypeWizardPage.typename.label")); 
		
		fSuperClassDialogField= new StringButtonDialogField(adapter);