org.eclipse.net4j.buddies.common
Interfaces 
IAccount
IBuddy
IBuddyContainer
IBuddyProvider
IBuddyStateEvent
ICollaboration
ICollaborationContainer
ICollaborationProvider
IFacility
IFacilityInstalledEvent
IMembership
IMembershipContainer
IMembershipKey
IMembershipProvider
IMessage
IMessageEvent
ISession
ISessionProvider
Enums 
IBuddy.State
ICollaboration.Visibility