code: private static String toErrorItemMessage(final String logMessage, final String throwableMessage) {
  		
  		StringBuilder sb = new StringBuilder();
  				
  		if ((throwableMessage != null) && (!throwableMessage.isEmpty())) {
  			sb.append(throwableMessage);
  			
  			if ((logMessage != null) && (!logMessage.isEmpty())) {
  				sb.append(" (");
  				sb.append(logMessage);
  				sb.append(")");
  			}			
  		} else {
  			sb.append(logMessage);
  		}
  
  		return sb.toString();
  	}
docs: Constructs the error item message from the log message and the throwable's message
  @param logMessage The log message (can be null)
  @param throwableMessage The throwable's message (can be null)
  @return The error item message