/usr/share/java/plexus-interactivity-api.jar is in libplexus-interactivity-api-java 1.0-alpha-6-6.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/java/../maven-repo/org/codehaus/plexus/plexus-interactivity-api/1.0-alpha-6/plexus-interactivity-api-1.0-alpha-6.jar