public POIFSFileSystem() {this(true);_header.setBATCount(1);_header.setBATArray(new int[]{1});BATBlock bb = BATBlock.createEmptyBATBlock(bigBlockSize, false);bb.setOurBlockIndex(1);_bat_blocks.add(bb);setNextBlock(0, POIFSConstants.END_OF_CHAIN);setNextBlock(1, POIFSConstants.FAT_SECTOR_BLOCK);_property_table.setStartBlock(0);}