/usr/share/maven-repo/org/apache/maven/maven-plugin-registry/debian/maven-plugin-registry-debian.jar is in libmaven2-core-java 2.2.1-26.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/maven-repo/org/apache/maven/maven-plugin-registry/debian/../../../../../../java/maven-plugin-registry-2.2.1.jar