/usr/share/java/naga-2_1-r42.jar is in libnaga-java 2.1-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/java/naga-2_1-r42-2.1.jar
/usr/share/java/naga-2_1-r42-2.1.jar