Added documentation

Signed-off-by: Emmanuel Bigeon <emmanuel@bigeon.fr>

gclc/src/main/java/net/bigeon/gclc/utils/ReadingRunnable.java

@@ -186,6 +186,10 @@ public final class ReadingRunnable implements Runnable {
         }
     }
     
+    /** Wait for a message to be delivered.
+     * 
+     * @param message the message
+     * @throws InterruptedException if the wait was interrupted */
     public void waitForDelivery(final String message) throws InterruptedException {
         Object mLock;
         synchronized (messageBlockerLock) {