/usr/share/java/java-boot-classpath-detector.jar is in libanimal-sniffer-java 1.7-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/java/../maven-repo/org/codehaus/mojo/java-boot-classpath-detector/1.7/java-boot-classpath-detector-1.7.jar