org.apache.poi.poifs.storage
Interfaces 
BlockList
BlockWritable
HeaderBlockConstants
ListManagedBlock
Classes 
BATBlock
BlockAllocationTableReader
BlockAllocationTableWriter
DocumentBlock
HeaderBlockReader
HeaderBlockWriter
PropertyBlock
RawDataBlock
RawDataBlockList
SmallBlockTableReader
SmallBlockTableWriter
SmallDocumentBlock
SmallDocumentBlockList