Building v3.4 --- hidden files in the {antlr3, gunit}-maven-plugin hierarchies

Greetings!

I have successfully built ANTLR 3.4 starting from the source tarball
from the antlr.org download page. I use Ubuntu 11.04 and java 1.6.

But had an issue with hidden files (.*.java) in two of the
sub-directories.

First, I am an idiot, as I am sure everyone already knows. The BUILD.txt
file clearly states that Maven 3.0.3 or better is required. It took me a
few minutes to realize that Ubuntu has an out of date Maven. After
upgrading things went much better. I mention this in the hope that
BUILD.txt might be altered to include many many many more warnings that
an up to date maven is required. For me the `mvn -N install` command
worked without error on the older version of maven but the
`mvn -Dmaven.test.skip=true` failed complaining about cyclic
dependencies.

What I am suggesting is a reminder in BUILD.txt near the discussion of
the `mvn -Dmaven.test.skip=true` command that version 3.0.3 or better is
required.

And so now the real reason for this email.

in both the antlr3-maven-plugin and gunit-maven-plugin sub-directory
hierarchies there are hidden, mac os related (i think), files that have
the .java extension. i can supply the specific file names if you need
them ---- this is from the antlr-3.4 source tarball on the antlr.org
download page.