Repository navigation

Completions

Windows > Preferences > Java > Editor > Content Assist > Advanced > Select all Java only

Importing maven projects with child projects

Repository Exploring > Check Out
Delete project
Import existing maven project

Default Encoding

Window > Preferences > Workspace > Encoding
Project > Run Configurations... > Common > Encoding > Inherited

Preferences configuration

workspace/.metadata/.plugins/org.eclipse.core.runtime/.settings

Debug configurations

workspace/.metadata/.plugins/org.eclipse.debug.core/.launches/