Self explanatory. Writing DDS is now as easy as ImageIO.write .
Info regarding the usage etc are in the README
Note regarding the compression: contrary to most solutions that are usually in violation of the S3TC patent, the S3TC delegate in DDSWriter uses the opengl drivers to provide the compression. Usually it works very well, but requires an lwjgl2 context (jme with lwjgl2) and a compatible driver (most of the drivers are).