diff --git a/DiscImageChef.Helpers/Extents/ExtentsByte.cs b/DiscImageChef.Helpers/Extents/ExtentsByte.cs
index f5e0dd5ff..2e6717a9e 100644
--- a/DiscImageChef.Helpers/Extents/ExtentsByte.cs
+++ b/DiscImageChef.Helpers/Extents/ExtentsByte.cs
@@ -44,6 +44,11 @@ namespace Extents
             backend = new List<Tuple<byte, byte>>();
         }
 
+        public ExtentsByte(List<Tuple<byte, byte>> list)
+        {
+            backend = list.OrderBy(t => t.Item1).ToList();
+        }
+
         public int Count { get { return backend.Count; } }
 
         public void Add(byte item)
diff --git a/DiscImageChef.Helpers/Extents/ExtentsInt.cs b/DiscImageChef.Helpers/Extents/ExtentsInt.cs
index 096aa5f1d..91604f116 100644
--- a/DiscImageChef.Helpers/Extents/ExtentsInt.cs
+++ b/DiscImageChef.Helpers/Extents/ExtentsInt.cs
@@ -44,6 +44,11 @@ namespace Extents
             backend = new List<Tuple<int, int>>();
         }
 
+        public ExtentsInt(List<Tuple<int, int>> list)
+        {
+            backend = list.OrderBy(t => t.Item1).ToList();
+        }
+
         public int Count { get { return backend.Count; } }
 
         public void Add(int item)
diff --git a/DiscImageChef.Helpers/Extents/ExtentsLong.cs b/DiscImageChef.Helpers/Extents/ExtentsLong.cs
index dde1c4dc2..11e1c7f03 100644
--- a/DiscImageChef.Helpers/Extents/ExtentsLong.cs
+++ b/DiscImageChef.Helpers/Extents/ExtentsLong.cs
@@ -44,6 +44,11 @@ namespace Extents
             backend = new List<Tuple<long, long>>();
         }
 
+        public ExtentsLong(List<Tuple<long, long>> list)
+        {
+            backend = list.OrderBy(t => t.Item1).ToList();
+        }
+
         public int Count { get { return backend.Count; } }
 
         public void Add(long item)
diff --git a/DiscImageChef.Helpers/Extents/ExtentsSByte.cs b/DiscImageChef.Helpers/Extents/ExtentsSByte.cs
index ec1c06083..bfc07ac9e 100644
--- a/DiscImageChef.Helpers/Extents/ExtentsSByte.cs
+++ b/DiscImageChef.Helpers/Extents/ExtentsSByte.cs
@@ -44,6 +44,11 @@ namespace Extents
             backend = new List<Tuple<sbyte, sbyte>>();
         }
 
+        public ExtentsSByte(List<Tuple<sbyte, sbyte>> list)
+        {
+            backend = list.OrderBy(t => t.Item1).ToList();
+        }
+
         public int Count { get { return backend.Count; } }
 
         public void Add(sbyte item)
diff --git a/DiscImageChef.Helpers/Extents/ExtentsShort.cs b/DiscImageChef.Helpers/Extents/ExtentsShort.cs
index 70f9c7e78..f508ace86 100644
--- a/DiscImageChef.Helpers/Extents/ExtentsShort.cs
+++ b/DiscImageChef.Helpers/Extents/ExtentsShort.cs
@@ -44,6 +44,11 @@ namespace Extents
             backend = new List<Tuple<short, short>>();
         }
 
+        public ExtentsShort(List<Tuple<short, short>> list)
+        {
+            backend = list.OrderBy(t => t.Item1).ToList();
+        }
+
         public int Count { get { return backend.Count; } }
 
         public void Add(short item)
diff --git a/DiscImageChef.Helpers/Extents/ExtentsUInt.cs b/DiscImageChef.Helpers/Extents/ExtentsUInt.cs
index a91ef9ad1..3d0988da9 100644
--- a/DiscImageChef.Helpers/Extents/ExtentsUInt.cs
+++ b/DiscImageChef.Helpers/Extents/ExtentsUInt.cs
@@ -44,6 +44,11 @@ namespace Extents
             backend = new List<Tuple<uint, uint>>();
         }
 
+        public ExtentsUInt(List<Tuple<uint, uint>> list)
+        {
+            backend = list.OrderBy(t => t.Item1).ToList();
+        }
+
         public int Count { get { return backend.Count; } }
 
         public void Add(uint item)
diff --git a/DiscImageChef.Helpers/Extents/ExtentsULong.cs b/DiscImageChef.Helpers/Extents/ExtentsULong.cs
index 95d0051da..c9f457060 100644
--- a/DiscImageChef.Helpers/Extents/ExtentsULong.cs
+++ b/DiscImageChef.Helpers/Extents/ExtentsULong.cs
@@ -44,6 +44,11 @@ namespace Extents
             backend = new List<Tuple<ulong, ulong>>();
         }
 
+        public ExtentsULong(List<Tuple<ulong, ulong>> list)
+        {
+            backend = list.OrderBy(t => t.Item1).ToList();
+        }
+
         public int Count { get { return backend.Count; } }
 
         public void Add(ulong item)
diff --git a/DiscImageChef.Helpers/Extents/ExtentsUShort.cs b/DiscImageChef.Helpers/Extents/ExtentsUShort.cs
index 3950aaa3c..9f7da19bc 100644
--- a/DiscImageChef.Helpers/Extents/ExtentsUShort.cs
+++ b/DiscImageChef.Helpers/Extents/ExtentsUShort.cs
@@ -44,6 +44,11 @@ namespace Extents
             backend = new List<Tuple<ushort, ushort>>();
         }
 
+        public ExtentsUShort(List<Tuple<ushort, ushort>> list)
+        {
+            backend = list.OrderBy(t => t.Item1).ToList();
+        }
+
         public int Count { get { return backend.Count; } }
 
         public void Add(ushort item)
diff --git a/DiscImageChef.Metadata/Resume.cs b/DiscImageChef.Metadata/Resume.cs
new file mode 100644
index 000000000..bc7443605
--- /dev/null
+++ b/DiscImageChef.Metadata/Resume.cs
@@ -0,0 +1,41 @@
+// /***************************************************************************
+// The Disc Image Chef
+// ----------------------------------------------------------------------------
+//
+// Filename       : Resume.cs
+// Author(s)      : Natalia Portillo <claunia@claunia.com>
+//
+// Component      : Component
+//
+// --[ Description ] ----------------------------------------------------------
+//
+//     Description
+//
+// --[ License ] --------------------------------------------------------------
+//
+//     This library is free software; you can redistribute it and/or modify
+//     it under the terms of the GNU Lesser General Public License as
+//     published by the Free Software Foundation; either version 2.1 of the
+//     License, or (at your option) any later version.
+//
+//     This library is distributed in the hope that it will be useful, but
+//     WITHOUT ANY WARRANTY; without even the implied warranty of
+//     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+//     Lesser General Public License for more details.
+//
+//     You should have received a copy of the GNU Lesser General Public
+//     License along with this library; if not, see <http://www.gnu.org/licenses/>.
+//
+// ----------------------------------------------------------------------------
+// Copyright © 2011-2017 Natalia Portillo
+// ****************************************************************************/
+using System;
+namespace DiscImageChef.Metadata
+{
+    public class Resume
+    {
+        public Resume()
+        {
+        }
+    }
+}