/usr/ is in libprotobuf-java 2.5.0-9ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/share/maven-repo/
/usr/share/maven-repo/com/
/usr/share/maven-repo/com/google/
/usr/share/maven-repo/com/google/protobuf/
/usr/share/maven-repo/com/google/protobuf/protobuf-java/
/usr/share/maven-repo/com/google/protobuf/protobuf-java/debian/
/usr/share/maven-repo/com/google/protobuf/protobuf-java/debian/protobuf-java-debian.pom
/usr/share/maven-repo/com/google/protobuf/protobuf-java/2.5.0/
/usr/share/maven-repo/com/google/protobuf/protobuf-java/2.5.0/protobuf-java-2.5.0.pom
/usr/share/java/
/usr/share/java/protobuf-2.5.0.jar
/usr/share/doc/
/usr/share/doc/libprotobuf-java/
/usr/share/doc/libprotobuf-java/changelog.Debian.gz
/usr/share/doc/libprotobuf-java/copyright
/usr/share/maven-repo/com/google/protobuf/protobuf-java/debian/protobuf-java-debian.jar
/usr/share/maven-repo/com/google/protobuf/protobuf-java/2.5.0/protobuf-java-2.5.0.jar
/usr/share/java/protobuf.jar