Relax visibility to public.

src/main/java/altk/comm/engine/exception/EngineException.java

@@ -8,7 +8,7 @@ package altk.comm.engine.exception;
  *
  */
 @SuppressWarnings("serial")
-public abstract class EngineException extends Exception
+public class EngineException extends Exception
 {
     public final String errorCodeText;
     public final String errorText;