/usr/share/java/javacc-maven-plugin.jar is in libjavacc-maven-plugin-java 2.6-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/java/../maven-repo/org/codehaus/mojo/javacc-maven-plugin/2.6/javacc-maven-plugin-2.6.jar