Adds code to get the Scala REPL working

classpath/java/util/jar/Attributes.java

@@ -0,0 +1,27 @@
+/* Copyright (c) 2013, Avian Contributors
+
+   Permission to use, copy, modify, and/or distribute this software
+   for any purpose with or without fee is hereby granted, provided
+   that the above copyright notice and this permission notice appear
+   in all copies.
+
+   There is NO WARRANTY for this software.  See license.txt for
+   details. */
+
+package java.util.jar;
+
+public class Attributes {
+  public static class Name {
+    private final String name;
+
+    private static final int MAX_NAME_LENGTH = 70;
+
+    public Name(String s) {
+      int len = s.length();
+      if (len == 0 || len > MAX_NAME_LENGTH)
+        throw new IllegalArgumentException();
+
+      name = s;
+    }
+  }
+}