/usr/share/java/uima-RegularExpressionAnnotator-2.3.1.jar is in libuima-addons-java 2.3.1-6.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/java/uima-RegularExpressionAnnotator.jar
/usr/share/java/uima-RegularExpressionAnnotator.jar