org.apache.lucene.store
Classes 
BufferedIndexInput
BufferedIndexOutput
ChecksumIndexInput
ChecksumIndexOutput
Directory
FSDirectory
FSDirectory.FSIndexInput
FSDirectory.FSIndexInput.Descriptor
FSDirectory.FSIndexOutput
IndexInput
IndexOutput
Lock
Lock.With
LockFactory
LockStressTest
LockVerifyServer
MMapDirectory
NativeFSLockFactory
NIOFSDirectory
NoLockFactory
RAMDirectory
RAMOutputStream
SimpleFSLockFactory
SingleInstanceLockFactory
VerifyingLockFactory
Exceptions 
AlreadyClosedException
LockObtainFailedException
LockReleaseFailedException