/usr/share/java/maven-repository-builder-1.0-alpha-2.jar is in libmaven-repository-builder-java 1.0~alpha2-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/java/../maven-repo/org/apache/maven/shared/maven-repository-builder/1.0-alpha-2/maven-repository-builder-1.0-alpha-2.jar