Addons does not work with Maven

I’m second day struggling with add-ons and maven. When I’m using non-maven everything works. After moving to maven project widgetset’s are compiled, every needed files are located in target/war_file_name/VAADIN/wdgetsets/org.package.of.sth.sth . However when I’m trying to run vaadin application I get the following error e.g.

Requested resource [VAADIN/widgetsets/com.cooldatasoft.vaadin.VaadinAddonMavenWidgetset/com.cooldatasoft.vaadin.VaadinAddonMavenWidgetset.nocache.js]
not found from filesystem or through class loader. Add widgetset and/or theme JAR to your classpath or add files to WebContent/VAADIN folder.

This happens with every plugin i try. I’ve also tried to run (i’ve only updated some dependecy versions) and I get also the same error.

What can I do to run add-ons in vaadin maven project?
Does anyboady have example working vaadin maven project with any add-on?

Try this one: