Packages 
Package Description
com.mongodb
Main package with core files.
com.mongodb.gridfs
GridFS tools.
com.mongodb.util
Package containing misc utils.
org.bson
Contains the base BSON classes and Encoder/Decoder.
org.bson.io
Contains classes implementing I/O operations used by BSON objects.
org.bson.types
Contains classes implementing various BSON types.
org.bson.util
Misc utils used by BSON.