/usr/share/doc/libjdom2-java/api/index-files/ is in libjdom2-java-doc 2.0.5-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/libjdom2-java/api/index-files/index-1.html
/usr/share/doc/libjdom2-java/api/index-files/index-10.html
/usr/share/doc/libjdom2-java/api/index-files/index-11.html
/usr/share/doc/libjdom2-java/api/index-files/index-12.html
/usr/share/doc/libjdom2-java/api/index-files/index-13.html
/usr/share/doc/libjdom2-java/api/index-files/index-14.html
/usr/share/doc/libjdom2-java/api/index-files/index-15.html
/usr/share/doc/libjdom2-java/api/index-files/index-16.html
/usr/share/doc/libjdom2-java/api/index-files/index-17.html
/usr/share/doc/libjdom2-java/api/index-files/index-18.html
/usr/share/doc/libjdom2-java/api/index-files/index-19.html
/usr/share/doc/libjdom2-java/api/index-files/index-2.html
/usr/share/doc/libjdom2-java/api/index-files/index-20.html
/usr/share/doc/libjdom2-java/api/index-files/index-21.html
/usr/share/doc/libjdom2-java/api/index-files/index-22.html
/usr/share/doc/libjdom2-java/api/index-files/index-3.html
/usr/share/doc/libjdom2-java/api/index-files/index-4.html
/usr/share/doc/libjdom2-java/api/index-files/index-5.html
/usr/share/doc/libjdom2-java/api/index-files/index-6.html
/usr/share/doc/libjdom2-java/api/index-files/index-7.html
/usr/share/doc/libjdom2-java/api/index-files/index-8.html
/usr/share/doc/libjdom2-java/api/index-files/index-9.html