When using the Java driver, you need to decide which one of the 3 different ones you will use. Then you select the one you want from the drop down menu at:
  https://mongodb.github.io/mongo-java-driver/

After installing the driver, if you need information about the classes and search for a given class in the Java docs at:

  http://mongodb.github.io/mongo-java-driver

You see only one set of docs for the 3 products.
Taking a "MongoClient" object for example; in one driver it is an interface and a class in another. The listed methods are not available in all drivers, so it is confusing if you use the Javadocs to see what you can do on an object

I think we should have 3 sets of Javadocs, one per downloadable driver.
It could be something like the following:

* http://mongodb.github.io/mongo-java-driver/mongodb-driver-sync/<versions>
* http://mongodb.github.io/mongo-java-driver/mongodb-driver-async/<versions>
* http://mongodb.github.io/mongo-java-driver/mongodb-driver-legacy/<versions>

As a user, I would see the docs that match the product I am using.