public class FoodJournalEntities : DbContext
{
    public DbSet Journals { get; set; }
    public DbSet JournalEntries { get; set; }
    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        modelBuilder.Entity()
               .HasOptional(j => j.JournalEntries)
               .WithMany()
               .WillCascadeOnDelete(true);
        base.OnModelCreating(modelBuilder);
    }
}