org.apache.catalina
Interfaces 
Authenticator
Cluster
Contained
Container
ContainerListener
ContainerServlet
Context
Engine
Executor
Host
InstanceListener
Lifecycle
LifecycleListener
Loader
Manager
Pipeline
Realm
Server
Service
Session
SessionListener
Store
Valve
Wrapper
Classes 
ContainerEvent
Globals
InstanceEvent
LifecycleEvent
ServerFactory
SessionEvent
Exceptions 
LifecycleException