simple Observable non thread safe implementation

ObservableBase.java

import javafx.beans.InvalidationListener;
import javafx.beans.Observable;

import java.util.HashSet;
import java.util.Set;

public abstract class ObservableBase implements Observable {
    private Set<InvalidationListener> listeners = new HashSet<>(1);

    @Override
    public void addListener(InvalidationListener listener) {
        listeners.add(listener);
    }

    @Override
    public void removeListener(InvalidationListener listener) {
        listeners.remove(listener);
    }

    protected void fireValueChangedEvent() {
        for (InvalidationListener listener : listeners) {
            try {
                listener.invalidated(this);
            } catch (Exception e) {
                Thread.currentThread()
                        .getUncaughtExceptionHandler()
                        .uncaughtException(Thread.currentThread(), e);
            }
        }
    }
}