Integrating Aceeditor

I am new to vaadin and I am trying to integrate aceeditor or codemirro addon and I have problem after problem.
I can build them via maven but I cannot generate an eclipse vaadin project and then integrate the add on per their instructions…
The directory structure eclipse creates is not compatible with the instructions of aceeditor.

The eclipse pluggin create a directory call webcontents. Is that the same as webapps?

Also when I tried to complile the widgetset I got a null point exception as an error message.

I am at a standstill.