JDK 9 RFR of adding javadoc to the serialver tool class

[joe darcy]

Hello,

To support stricter doclint checking for the jdk.compiler module 
(http://mail.openjdk.java.net/pipermail/build-dev/2015-March/014560.html), 
some javadoc needs to be added to a class for the serialver tool which 
is in the jdk repo. Patch below.

I'm not quite sure why serialver is the the jdk.compiler module, perhaps 
that is the least-bad alternative. A way to avoid adding javadoc here 
would be to adjust the package filter being used in the makefile. The 
current filter of

     Xdoclint/package:-com.sun.tools.*

has the advantage of checking any new packages that may come in the only 
excluding those known not to be of interest for such check.

Thanks,

-Joe

diff -r 4330ca0a31bb 
src/jdk.compiler/share/classes/sun/tools/serialver/SerialVer.java
--- a/src/jdk.compiler/share/classes/sun/tools/serialver/SerialVer.java 
Thu Feb 12 12:56:48 2015 -0800
+++ b/src/jdk.compiler/share/classes/sun/tools/serialver/SerialVer.java 
Fri Mar 13 10:34:59 2015 -0700
@@ -1,5 +1,5 @@
  /*
- * Copyright (c) 1996, 2014, Oracle and/or its affiliates. All rights 
reserved.
+ * Copyright (c) 1996, 2015, Oracle and/or its affiliates. All rights 
reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
@@ -37,6 +37,9 @@
  import java.util.StringTokenizer;
  import sun.net.www.ParseUtil;

+/**
+ * Supporting class for the serialver tool.
+ */
  public class SerialVer {

      /*
@@ -117,6 +120,10 @@
          }
      }

+    /**
+     * Entry point for serialver tool.
+     * @param args the arguments
+     */
      public static void main(String[] args) {
          String envcp = null;
          int i = 0;