To include only a set of files with tar, you can use the following one liner. This example will tar all files with the java extension in the archive with the name test.
find . -name '*.java' | tar czvf test.tar.gz --files-from -
Source: http://www.computing.net/answers/linux/tar-up-key-files-by-extension/294...
Delft University of Technology
Delft Bioinformatics Lab
Van Mourik Broekmanweg 6 (building 28)
2628 XE Delft
The Netherlands
http://bioinformatics.tudelft.nl/
Broad Institute of MIT and Harvard
Genome Sequencing and Analysis Program
7 Cambridge Center
Cambridge, MA, 02142
USA
http://www.broadinstitute.org