drink machine java and class project

The following project is a very simple project in java requiring two separate classes, with defined variables and two methods. The scenario is a drink machine example and the following code will need to be converted into a uml class diagram showing cardinality. The end result is a simple report which will discuss code strangth and weaknesses and will require some basic testing. If you are interested, I can provide you with the actual assignment brief, mark scheme and lecture notes regarding the level of knowledge in java coding which is basic. The development in java needs to be done netbean with internal comments etc. the class diagram in visio.