/usr/share/java/doxia-module-xdoc-1.1.4.jar is in libdoxia-java 1.1.4-3ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/java/doxia-module-xdoc.jar
/usr/share/java/doxia-module-xdoc.jar