org.bukkit.plugin
Interfaces 
EventExecutor
Plugin
PluginAwareness
PluginLoader
PluginManager
ServicesManager
Classes 
PluginBase
PluginDescriptionFile
PluginLogger
RegisteredListener
RegisteredServiceProvider
SimplePluginManager
SimpleServicesManager
TimedRegisteredListener
Enums 
PluginAwareness.Flags
PluginLoadOrder
ServicePriority
Exceptions 
AuthorNagException
IllegalPluginAccessException
InvalidDescriptionException
InvalidPluginException
UnknownDependencyException