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
if (isEnclosingTypeSelected()) {
			return fCurrEnclosingType;
		}
		return null;
	}
	/**
	 * Sets the enclosing type. The method updates the underlying model 
	 * and the text of the control.
	 * 
	 * @param type the enclosing type
	 * @param canBeModified if <code>true</code> the enclosing type field is
	 * editable; otherwise it is read-only.
	 */	
	public void setEnclosingType(IType type, boolean canBeModified) {
		fCurrEnclosingType= type;
		fCanModifyEnclosingType= canBeModified;
		String str= (type == null) ? "" : JavaModelUtil.getFullyQualifiedName(type); 
		fEnclosingTypeDialogField.setText(str);
		updateEnableState();
	}
	
	/**
	 * Returns the selection state of the enclosing type checkbox.
	 * 
	 * @return the seleciton state of the enclosing type checkbox
	 */
	public boolean isEnclosingTypeSelected() {
		return fEnclosingTypeSelection.isSelected();
	}
	/**