org.apache.poi.poifs.filesystem
Interfaces 
BATManaged
DirectoryEntry
DocumentEntry
Entry
POIFSWriterListener
Classes 
BlockStore
DirectoryNode
DocumentDescriptor
DocumentInputStream
DocumentNode
DocumentOutputStream
EntryNode
NDocumentInputStream
NPOIFSDocument
NPOIFSFileSystem
NPOIFSMiniStore
NPOIFSStream
ODocumentInputStream
Ole10Native
POIFSDocument
POIFSDocumentPath
POIFSFileSystem
POIFSWriterEvent
Exceptions 
OfficeXmlFileException
Ole10NativeException