Project documentation for the university project.

I have already developed a system using PHP and MySQL on Smarty framework. But I am not familiar with drawing UML diagrams but I want them to be professional in the documentation so I want someone to draw those diagrams. I want to draw following diagrams. - Class diagrams - Sequence diagrams - Database diagrams System is a simple marketplace and I can give the usecase diagrams and the database structure with flowcharts to understand the system.