With classmap you can specify the table name in mapping .
public class BarMap : ClassMap<Bar>
{
public BarMap()
{
Table("FooBar");
}
}
With automap, you can override the table name.
.Mappings( m => m.AutoMappings.Add( AutoMap.AssemblyOf<Bar>()
.Override<Bar>( b => {
b.Table("FooBar");
}))
conventions, .