NHibernate programmatically mapping

I want to create a custom mapping standard so I don't have to create the map.cs file for all new classes in the project.

public class Person
{
    public int PersonID { get; set; }
    public string Name { get; set; }
}

Usually I'd have this:

public class PersonMap : ClassMapping<Person>
{
    public PersonMap()
    {
        Table("Person");

        Id(p => p.PersonID, map => 
        {
            map.Column("PersonID");
            map.Generator(Generators.Identity);
        });

        Property(p => p.Name, map => map.Column("Name"));
    }
}

I'd like to dynamically create these mappings based on some standards using reflection.

public class GenericDAL<T> where T : class, new()
{
    public GenericDAL() 
    {
        Configuration hConfig = new Configuration();
        hConfig.DatabaseIntegration(c =>
        {
            c.ConnectionStringName = "myConnectionStringName";
            c.Dialect<MsSql2012Dialect>();
        });

        ModelMapper mapper = new ModelMapper();
        //Dynamic Mapping here

        ISessionFactory _sessionFactory = hConfig.BuildSessionFactory();
    }
}

I don't know how I can create a new ClassMapping from my T, how can I do this?