Update App.java

Correction of error detected by maven-pmd-plugin.

Author: thomasoss

tls/src/main/java/com/iluwatar/tls/App.java

@@ -104,7 +104,7 @@ public static void main(String[] args) {
       System.out.println("The List exceptionList contains " + counterExceptions + " exceptions");
 
     } catch (Exception e) {
-      // no action here 
+      System.out.println("Abnormal end of program. Program throws exception: "); 
     }
     executor.shutdown();
   }