We don't have an empty project, but we have several populated ones. Do an ls */jbossbuild.xml in jboss-head to see several examples. At this point, the kernel module is probably the best example of what your directory structure and jbossbuild.xml should look like.

I'll take a crack at a canonical component source structure:

<component/module root>
build.xml (component definition)
.classpath, .project
docs
src
 bin (*.sh, *.bat)
 etc (default.mf)
 main
 test (unit tests)
 resources
 dtd
 test
 properties (*.properties in org/jboss/**)