// Set the offset of the end of the file
endOfFileOffset = fileChannel.size();
// Now, initialize the Copied Page BTree
copiedPageBTree = new BTree<RevisionName, long[]>( COPIED_PAGE_BTREE_NAME, new RevisionNameSerializer(),
new LongArraySerializer() );
// and initialize the Revision BTree
revisionBTree = new BTree<RevisionName, Long>( REVISION_BTREE_NAME, new RevisionNameSerializer(),
new LongSerializer() );