Add @SuppressWarnings("resource") for Fluent APIs.

Author: Gary Gregory

src/main/java/org/apache/commons/io/output/ProxyCollectionWriter.java

@@ -77,6 +77,7 @@ protected void afterWrite(final int n) throws IOException {
      * @throws IOException if an I/O error occurs.
      * @since 2.0
      */
+    @SuppressWarnings("resource") // Fluent API.
     @Override
     public Writer append(final char c) throws IOException {
         try {
@@ -96,6 +97,7 @@ public Writer append(final char c) throws IOException {
      * @return this writer
      * @throws IOException if an I/O error occurs.
      */
+    @SuppressWarnings("resource") // Fluent API.
     @Override
     public Writer append(final CharSequence csq) throws IOException {
         try {
@@ -118,6 +120,7 @@ public Writer append(final CharSequence csq) throws IOException {
      * @return this writer
      * @throws IOException if an I/O error occurs.
      */
+    @SuppressWarnings("resource") // Fluent API.
     @Override
     public Writer append(final CharSequence csq, final int start, final int end) throws IOException {
         try {