/usr/share/maven-repo/org/libreoffice/unoil/5.1.6/unoil-5.1.6.jar is in libreoffice-java-common 1:5.1.6~rc2-0ubuntu1~xenial6.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/maven-repo/org/libreoffice/unoil/5.1.6/../../../../../java/unoil-5.1.6.jar