Simple Java GUI Application with DOM parsing

This application should be written in plain java using swing for ui design I need two classes Author and Article Autor has: Id, First Name, Last name, phone, list of written articles Article has: Id, Author, name Funkcionality to add new author, add new article, list all articles, list all authors(with written articles) then adding new article, use dropdown to choose one of the existing authors save/load to XML using DOM!