7104201: Refactor DocCommentScanner

Add new Comment helper class to parse contents of comments in source code

Reviewed-by: jjg

langtools/test/tools/javac/depDocComment/DeprecatedDocComment4.java

@@ -0,0 +1,20 @@
+/**
+ * @test  /nodynamiccopyright/
+ * @bug 7104201
+ * @summary Refactor DocCommentScanner
+ * @compile/fail/ref=DeprecatedDocComment4.out -XDrawDiagnostics -Werror -Xlint:dep-ann DeprecatedDocComment4.java
+ */
+
+class DeprecatedDocComment4 {
+    /** @deprecated **/
+    /* block */
+    void test1() {};
+
+    /** @deprecated **/
+    /** double javadoc */
+    void test2() {};
+
+    /** @deprecated **/
+    //line comment
+    void test3() {};
+}