diff --git a/Data/MapData.cs b/Data/MapData.cs
index e49cc51..64f1a00 100644
--- a/Data/MapData.cs
+++ b/Data/MapData.cs
@@ -8,8 +8,10 @@ namespace ProjectGrid.Data
   public class MapData
   {
     [Key]
+    [Column("MapId")]
     public int Id { get; set; }
     public string Name { get; set; }
+    public string Description { get; set; }
 
     [Required]
     public uint Width { get; set; }
diff --git a/Data/TileData.cs b/Data/TileData.cs
index 1003756..43b5ff5 100644
--- a/Data/TileData.cs
+++ b/Data/TileData.cs
@@ -5,14 +5,18 @@ using System.ComponentModel.DataAnnotations;
 namespace ProjectGrid.Data
 {
   [Table("Tile", Schema = "Map")]
-  public class MapData
+  public class TileData
   {
     [Key]
-    [Column("MapId")]
+    [Column("TileId")]
     public int Id { get; set; }
+    public int MapId { get; set; }
     public string Name { get; set; }
     public string Description { get; set; }
 
+    [ForeignKey("MapId")]
+    public virtual MapData map { get; set; }
+
     [Required]
     [Column("PosX")]
     public uint X { get; set; }
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..c612b80
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,6 @@
+{
+  "name": "ProjectGrid.backend",
+  "lockfileVersion": 2,
+  "requires": true,
+  "packages": {}
+}