Make static fields final.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/codec/trunk@1151848 13f79535-47bb-0310-9956-ffa450edef68

Author: garydgregory

src/java/org/apache/commons/codec/language/bm/Languages.java

@@ -141,7 +141,7 @@ public static LanguageSet from(Set<String> langs) {
     /**
      * No languages at all.
      */
-    public static LanguageSet NO_LANGUAGES = new LanguageSet() {
+    public static final LanguageSet NO_LANGUAGES = new LanguageSet() {
         @Override
         public LanguageSet restrictTo(LanguageSet other) {
             return this;
@@ -171,7 +171,7 @@ public boolean isEmpty() {
     /**
      * Any/all languages.
      */
-    public static LanguageSet ANY_LANGUAGE = new LanguageSet() {
+    public static final LanguageSet ANY_LANGUAGE = new LanguageSet() {
         @Override
         public LanguageSet restrictTo(LanguageSet other) {
             return other;