fixed comments

ipaacalib/java/src/ipaaca/util/communication/FutureIU.java

@@ -65,7 +65,7 @@ public class FutureIU
     }
 
     /**
-     * Wait for at most the given time for the IU and take it (can be done only once)    
+     * Wait for at most the given time for the IU and take it (can be done only once), return null on timeout    
      */
     public AbstractIU take(long timeout, TimeUnit unit) throws InterruptedException
     {

ipaacalib/java/src/ipaaca/util/communication/FutureIUs.java

@@ -55,7 +55,7 @@ public class FutureIUs
     }
     
     /**
-     * Wait for at most the given time for the IU and take it (can be done only once)    
+     * Wait for at most the given time for the IU and take it (can be done only once), return null on timeout        
      */
     public AbstractIU take(String idValue, long timeout, TimeUnit unit) throws InterruptedException
     {