8056205: (fs) Potential for NPE in Files.walkFileTree if closing directory fails
Summary: Change incorrect ioe != null to ioe == null
Reviewed-by: rriggs

8134373: use collections convenience factories in the JDK
Reviewed-by: scolebourne, prappo, dfuchs, redestad, smarks
Contributed-by: jbluettduncan@gmail.com

8163180: Typos around @code javadoc tag usage
Reviewed-by: dfuchs

8054834: Modular Source Code
Reviewed-by: alanb, chegar, ihse, mduigou
Contributed-by: alan.bateman@oracle.com, alex.buckley@oracle.com, chris.hegarty@oracle.com, erik.joelsson@oracle.com, jonathan.gibbons@oracle.com, karen.kinnear@oracle.com, magnus.ihse.bursie@oracle.com, mandy.chung@oracle.com, mark.reinhold@oracle.com, paul.sandoz@oracle.com