/usr/share/fusiondirectory/plugins/addons/argonaut/events/ is in fusiondirectory-plugin-argonaut 1.0.8.2-5+deb8u1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/fusiondirectory/plugins/addons/argonaut/events/DaemonEvent.tpl
/usr/share/fusiondirectory/plugins/addons/argonaut/events/class_DaemonEvent.inc
/usr/share/fusiondirectory/plugins/addons/argonaut/events/class_EventAddSystemDialog.inc
/usr/share/fusiondirectory/plugins/addons/argonaut/events/class_filterSystemByIp.inc
/usr/share/fusiondirectory/plugins/addons/argonaut/events/eventTargetSystems-filter.tpl
/usr/share/fusiondirectory/plugins/addons/argonaut/events/eventTargetSystems-filter.xml
/usr/share/fusiondirectory/plugins/addons/argonaut/events/eventTargetSystems-list.xml
/usr/share/fusiondirectory/plugins/addons/argonaut/events/target_list.tpl
/usr/share/fusiondirectory/plugins/addons/argonaut/events/timestamp_select.tpl