/usr/share/maven-repo/org/antlr/gunit/3.x/gunit-3.x.jar is in libantlr3-gunit-java 3.2.is.3.2-7ubuntu3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/maven-repo/org/antlr/gunit/3.x/../../../../../java/gunit.jar