Close output files before throwing exception due to unpaired mates.
Close output files before throwing exception due to unpaired mates.

annkupi/picard,annkupi/picard,alecw/picard,nh13/picard,annkupi/picard,alecw/picard,broadinstitute/picard,annkupi/picard,broadinstitute/picard,broadinstitute/picard,nh13/picard,alecw/picard,broadinstitute/picard,alecw/picard,nh13/picard,broadinstitute/picard,nh13/picard