Structure Map scanner convention for registering concrete types that implement multiple of the same interfaces but with varying generic parameter.

HandleDomainEventsScanner.cs

public class HandleDomainEventsScanner : IRegistrationConvention
{
    public void Process(Type type, Registry registry)
    {
        foreach(var interfaceType in type.GetInterfaces()
            // see https://gist.github.com/gabrieljoelc/5706069 for IsGenericTypeAssignableFrom() extension method
            .Where(t => typeof(IHandleDomainEvents<>).IsGenericTypeAssignableFrom(t)))
            registry.AddType(interfaceType, type));
    }
}

MyDualPurposeHandlerClass.cs

public class MyDualPurposeHandlerClass : IHandleDomainEvents<Foo>,
        IHandleDomainEvents<Bar>
{
    public void Handle(Foo @event)
    {}
    public void Handle(Bar @event)
    {}
}

MyStructureMapRegistry.cs

public class MyStructureMapRegistry : Registry
{
    public MyStructureMapRegistry()
    {
        Scan(scanner =>
        {
            scanner.AssemblyContainingType<MyStructureMapRegistry>();
            scanner.Convention<HandleDomainEventsScanner>();
        });
    }
}