/usr/share/maven-repo/org/apache/activemq/activemq-core/debian/activemq-core-debian.jar is in libactivemq-java 5.6.0+dfsg-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/maven-repo/org/apache/activemq/activemq-core/debian/../../../../../../java/activemq-core.jar