/usr/ is in libpostgresql-jdbc-java 9.2-1002-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/share/java/
/usr/share/java/postgresql-jdbc4-9.2.jar
/usr/share/java/postgresql-jdbc3-9.2.jar
/usr/share/doc/
/usr/share/doc/libpostgresql-jdbc-java/
/usr/share/doc/libpostgresql-jdbc-java/copyright
/usr/share/doc/libpostgresql-jdbc-java/README.gz
/usr/share/doc/libpostgresql-jdbc-java/changelog.Debian.gz
/usr/share/maven-repo/
/usr/share/maven-repo/postgresql/
/usr/share/maven-repo/postgresql/postgresql/
/usr/share/maven-repo/postgresql/postgresql/9.2.jdbc4/
/usr/share/maven-repo/postgresql/postgresql/9.2.jdbc4/postgresql-9.2.jdbc4.pom
/usr/share/maven-repo/postgresql/postgresql/9.2.jdbc3/
/usr/share/maven-repo/postgresql/postgresql/9.2.jdbc3/postgresql-9.2.jdbc3.pom
/usr/share/maven-repo/postgresql/postgresql/debian/
/usr/share/java/postgresql-jdbc4.jar
/usr/share/java/postgresql-jdbc3.jar
/usr/share/java/postgresql.jar
/usr/share/maven-repo/postgresql/postgresql/9.2.jdbc4/postgresql-9.2.jdbc4.jar
/usr/share/maven-repo/postgresql/postgresql/9.2.jdbc3/postgresql-9.2.jdbc3.jar
/usr/share/maven-repo/postgresql/postgresql/debian/postgresql-debian.jar