/usr/share/maven-repo/org/libreoffice/unoil/debian/unoil-debian.jar is in libreoffice-java-common 1:5.1.2-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/maven-repo/org/libreoffice/unoil/debian/../../../../../java/unoil-5.1.2.jar