/usr/share/maven-repo/com/sun/ is in librngom-java 2.3.0-3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/maven-repo/com/sun/xml/
/usr/share/maven-repo/com/sun/xml/bind/
/usr/share/maven-repo/com/sun/xml/bind/external/
/usr/share/maven-repo/com/sun/xml/bind/external/rngom/
/usr/share/maven-repo/com/sun/xml/bind/external/rngom/2.3.0/
/usr/share/maven-repo/com/sun/xml/bind/external/rngom/2.3.0/rngom-2.3.0.jar
/usr/share/maven-repo/com/sun/xml/bind/external/rngom/2.3.0/rngom-2.3.0.pom
/usr/share/maven-repo/com/sun/xml/bind/external/rngom/debian/
/usr/share/maven-repo/com/sun/xml/bind/external/rngom/debian/rngom-debian.jar
/usr/share/maven-repo/com/sun/xml/bind/external/rngom/debian/rngom-debian.pom
/usr/share/maven-repo/com/sun/xml/bind/mvn/
/usr/share/maven-repo/com/sun/xml/bind/mvn/jaxb-external-parent/
/usr/share/maven-repo/com/sun/xml/bind/mvn/jaxb-external-parent/2.3.0/
/usr/share/maven-repo/com/sun/xml/bind/mvn/jaxb-external-parent/2.3.0/jaxb-external-parent-2.3.0.pom
/usr/share/maven-repo/com/sun/xml/bind/mvn/jaxb-external-parent/debian/
/usr/share/maven-repo/com/sun/xml/bind/mvn/jaxb-external-parent/debian/jaxb-external-parent-debian.pom