Bug 73337 New compiler option (COMPILER_PB_ENUM_IDENTIFIER) needs UI
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/CompilerConfigurationBlock.java
int resourceType= IResource.FILE;
			int lastCharacter= fileName.length() - 1;
			if (lastCharacter >= 0 && fileName.charAt(lastCharacter) == '/') {
				fileName= fileName.substring(0, lastCharacter);
				resourceType= IResource.FOLDER;
			}
			IStatus status= workspace.validateName(fileName, resourceType);
			if (status.matches(IStatus.ERROR)) {
				String message= PreferencesMessages.getFormattedString("CompilerConfigurationBlock.filter.invalidsegment.error", status.getMessage()); 
				return new StatusInfo(IStatus.ERROR, message);
			}
		}
		return new StatusInfo();
	}
		
	/*
	 * Update the compliance controls' enable state
	 */		
	private void updateComplianceEnableState() {
		boolean enabled= checkValue(INTR_DEFAULT_COMPLIANCE, USER_CONF);
		for (int i= fComplianceControls.size() - 1; i >= 0; i--) {
			Control curr= (Control) fComplianceControls.get(i);
			curr.setEnabled(enabled);
		}
	}
	
	private void updateAssertAsIdentifierEnableState() {
		if (checkValue(INTR_DEFAULT_COMPLIANCE, USER_CONF)) {
			boolean enabled= checkValue(PREF_SOURCE_COMPATIBILITY, VERSION_1_3);
			Combo combo= getComboBox(PREF_PB_ASSERT_AS_IDENTIFIER);