Need to add missed constructor to the SwingEventMonitor, see the SwingEventMonitor.java:

public class SwingEventMonitor extends AWTEventMonitor {

    /**
     * Constructs a {@code SwingEventMonitor}.
     */

    /**
     * The master list of all listeners registered by other classes.
     * This can only be publicly modified by calling the add or
     * remove listener methods in this class.
     */