Added Entry initial repo and services for a create action.

Component/Entries/Repository/Entry.cs

@@ -0,0 +1,29 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Diary.Component.Entries.Repository
+{
+	[Table("Entries", Schema = "Diary")]
+	public class Entry
+	{
+		[Key]
+		public int EnrtyID { get; set; }
+
+		[Required]
+		[Column(TypeName="date")]
+		public DateTime Date { get; set; }
+
+		[Required]
+		public DateTime ValidFrom { get; set; }
+		public DateTime? ValidTo { get; set; }
+
+		public string Note { get; set; } 
+
+
+	}
+}

Component/Entries/Repository/EntryConfiguration.cs

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+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+
+namespace Diary.Component.Entries.Repository
+{
+	public class EntryConfiguration : IEntityTypeConfiguration<Entry>
+	{
+		public void Configure(EntityTypeBuilder<Entry> builder)
+		{
+			
+		}
+	}
+}

Component/Entries/Repository/EntryRepository.cs

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+using Diary.Data;
+
+namespace Diary.Component.Entries.Repository
+{
+	public interface IEntryRepository
+	{
+		Task<Entry> CreateAsync(Entry entry);
+	}
+
+
+	public class EntryRepository : IEntryRepository
+	{
+		private readonly IDiaryDBContext _diaryDbContext;
+
+		public EntryRepository(IDiaryDBContext diaryDbContext)
+		{
+			_diaryDbContext = diaryDbContext ?? throw new ArgumentNullException(nameof(diaryDbContext));
+		}
+
+		public async Task<Entry> CreateAsync(Entry entry)
+		{
+			await _diaryDbContext.Entries.AddAsync(entry);
+			return entry;
+		}
+	}
+}