Remove javadoc warnings when

[dspinellis]

The source code requires fixing to remove numerous javadoc warnings.

  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:132: warning: no @param for opt
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:132: warning: no @param for r
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:132: warning: no @return
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:156: warning: no @param for s
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:156: warning: no @return
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:187: warning: no @param for s
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:187: warning: no @return
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:206: warning: no @param for opt
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:206: warning: no @param for s
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:206: warning: no @return
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:231: warning: no @param for opt
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:239: warning: no @param for opt
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:239: warning: no @param for e
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:239: warning: no @return
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:255: warning: no @param for opt
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:255: warning: no @param for p
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:255: warning: no @return
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:266: warning: no @param for opt
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:266: warning: no @param for t
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:266: warning: no @return
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:277: warning: no @param for opt
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:277: warning: no @param for t
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:277: warning: no @return
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:293: warning: no @param for opt
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:293: warning: no @param for t
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:293: warning: no @return
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:304: warning: no @param for opt
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:304: warning: no @param for fd
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:325: warning: no @param for opt
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:325: warning: no @param for m
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:325: warning: no @return
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:345: warning: no @param for opt
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:345: warning: no @param for m
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:345: warning: no @return
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:370: warning: no @param for opt
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:404: warning: no @param for opt
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:404: warning: no @param for c
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:404: warning: no @param for align
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:416: warning: no @param for c
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:416: warning: no @return
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:442: warning: no @param for s
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:442: warning: no @return
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:460: warning: no @param for c
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:460: warning: no @param for rootClass
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:460: warning: no @return
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:611: warning: no @param for c
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:611: warning: no @return
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:625: warning: no @param for opt
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:625: warning: no @param for rt
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:655: warning: no @param for opt
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:655: warning: no @param for rt
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:655: warning: no @param for tailLabel
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:655: warning: no @param for label
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:655: warning: no @param for headLabel
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:685: warning: no @param for opt
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:685: warning: no @param for rt
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:685: warning: no @param for tailLabel
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:685: warning: no @param for label
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:685: warning: no @param for headLabel
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:695: warning: no @param for c
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:695: warning: no @return
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:707: warning: no @return
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:718: warning: no @param for c
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:768: warning: no @param for root
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:806: warning: no description for @param
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:817: warning: no description for @param
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:819: warning: no @param for c
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:856: warning: no description for @param
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:869: warning: no @param for c
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:869: warning: no @return
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:877: warning: no description for @param
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:879: warning: no @param for c
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:947: warning: no @param for <T>
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:947: warning: no @param for docs
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:947: warning: no @param for visibility
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:947: warning: no @return
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:1012: warning: no @param for name
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:1012: warning: no @return
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:1021: warning: no @param for cd
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:1021: warning: no @param for rootClass
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:1021: warning: no @return
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:1085: warning: no @param for className
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:1085: warning: no @return
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:1103: warning: no @param for className
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:1103: warning: no @return
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:1117: warning: no description for @throws
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:1197: warning: no @param for opt
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:1211: warning: no @param for opt
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:1242: warning: no description for @param
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:1243: warning: no description for @param
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:1244: warning: no description for @param
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:1245: warning: no description for @return
  [javadoc] src/main/java/org/umlgraph/doclet/ClassGraph.java:1275: warning: no @return
  [javadoc] src/main/java/org/umlgraph/doclet/ClassMatcher.java:32: warning: no @param for cd
  [javadoc] src/main/java/org/umlgraph/doclet/ClassMatcher.java:32: warning: no @return
  [javadoc] src/main/java/org/umlgraph/doclet/ClassMatcher.java:37: warning: no @param for name
  [javadoc] src/main/java/org/umlgraph/doclet/ClassMatcher.java:37: warning: no @return
  [javadoc] src/main/java/org/umlgraph/doclet/ContextMatcher.java:83: warning: no description for @param
  [javadoc] src/main/java/org/umlgraph/doclet/ContextMatcher.java:102: warning: no description for @param
  [javadoc] src/main/java/org/umlgraph/doclet/ContextMatcher.java:63: warning: no description for @throws