org.openmrs.module
Interfaces 
Activator
ModuleActivator
Classes 
AdvicePoint
BaseModuleActivator
Extension
Module
ModuleClassLoader
ModuleConstants
ModuleFactory
ModuleFileParser
ModuleUtil
SqlDiffFileParser
UpdateFileParser
VersionComparator
Enums 
Extension.MEDIA_TYPE
Exceptions 
MandatoryModuleException
ModuleException
ModuleMustStartException
OpenmrsCoreModuleException