To create a new Java Meterpreter extension, you can use a templating system
called Maven Archetypes.

In this directory, type

		cd extension-archetype
		mvn install
		cd ..
		mvn -DarchetypeGroupId=com.metasploit -DarchetypeArtifactId=extension-archetype -Dversion=1-SNAPSHOT archetype:generate

and follow the instructions.

You can choose arbitrary groupId, artifactId and package names; the
default extensions use
	groupId: com.metasploit
	artifactId: Metasploit-Java-Meterpreter-${pluginName}
	package: com.metasploit.meterpreter.${pluginName}

The pluginName must satisfy the constraints for a Meterpreter plugin name:
only lowercase letters and digits are allowed, and the first character may
not be a digit.


The newly created project will include a <NAME>.rb file in its root directory
that needs to be moved to

msf3/lib/rex/post/meterpreter/extensions/<NAME>/<NAME>.rb

so that the extension can be loaded from a post module (or interactively
from irb) like this:

		client = session
		if client.<NAME> == nil
			client.core.use('<NAME>')
		end
		print_status client.<NAME>.<NAME>_greet_world()