Java to Kotlin converter: added test data file back

j2k/tests/testData/ast/comments/comments.kt

@@ -0,0 +1,30 @@
+package foo
+
+// we use package 'foo'
+
+// imports:
+import java.util.ArrayList
+
+// we need ArrayList
+
+// let's declare a class:
+class A /* just a sample name*/() : Runnable /* let's implement Runnable */ {
+    fun foo/* again a sample name */(p: Int /* parameter p */, c: Char /* parameter c */) {
+        // let's print something:
+        System.out.println("1") // print 1
+        System.out.println("2") // print 2
+
+        System.out.println("3") // print 3
+
+        // end of printing
+
+        if (p > 0) {
+            // do this only when p > 0
+            // we print 4 and return
+            System.out.println("3")
+            return  // do not continue
+        }
+
+        // some code to be added
+    }
+} // end of class A