ProjectDDD/Assets/_DDD/_Scripts/GameEvent/GameEvents.cs

using UnityEngine;

namespace DDD
{
    public static class GameEvents
    {
        public static InteractionEvent Interaction = new InteractionEvent();
    }
    public static class RestaurantEvents
    {
        // Some events...
    }
    public static class VoyageEvents
    {
        // Some events...
    }

    public class InteractionEvent : IEvent
    {
        public GameObject Causer;
        public GameObject Target;
    }
}