Experimentation with SQLContainers

Created a new DummyTable form, attempting to connect the table widget to a remote MySQL database.
Following the vaadin docs (https://vaadin.com/tutorial/sql/-/section/sqlcontainer-basics.replacing-indexedcontainer.html) and Chapter 9 of the Vaadin Book,  I set up some objects to manage the containers.

I'm trying the following architecture (attempting to follow MVC): Each (for example) Form.java file has a bunch of autogenerated junk plus a constructor. The constructor is where the binding between the View and the Model happens. FormModel.java contains the methods needed to create the necessary SQLContainers (and other containers) using the DBHelper object (calling a getter on a Connection object), that can be used for binding in the View.

RIght now, the DummyTableModel.java file is "hard-coded". Ideally, I'd like to have it extend a "Model" class.

This revision compiles but does not run on my laptop. I'm having issues getting the MySQL JDBC driver working. When I figure out how it works, however, this code should work very smoothly.