activemq-artemis/docs/hacking-guide/en/formatting.md

Code Formatting

Eclipse code formatting and (basic) project configuration files can be found at the etc/ folder. You should manually copy them after importing all your projects:

for settings_dir in `find . -type d -name .settings`; do
   \cp -v etc/org.eclipse.jdt.* $settings_dir
done

Do not use the maven-eclipse-plugin to copy the files as it conflicts with m2e.