class EfvmSyntaxErrorMessageProvider extends SyntaxErrorMessageProvider {

	public static String INCOMPLETE_UNORDERED_GROUP = "INCOMPLETE_UNORDERED_GROUP";

	@Override
	public SyntaxErrorMessage getSyntaxErrorMessage(IParserErrorContext context) {
		if (context.getRecognitionException() instanceof FailedPredicateException) {
			return new SyntaxErrorMessage(
					"The following elements are necassary for an adapter inctance: Name, Tool and Model",
					INCOMPLETE_UNORDERED_GROUP);
		}
		return super.getSyntaxErrorMessage(context);
	}
}

if( abstractelment instanceof ConfigurationName){
dosomething...
}