diff --git a/BFR/MainWindow.xaml.cs b/BFR/MainWindow.xaml.cs
index d95b0b0..82bfbf1 100644
--- a/BFR/MainWindow.xaml.cs
+++ b/BFR/MainWindow.xaml.cs
@@ -17,9 +17,7 @@ namespace BFR
 {
     public partial class MainWindow : Window
     {
-        public async Task OpenDirectoryButtonClick() =>
-            OpenDirectory(await new OpenFolderDialog() { Directory = WorkingDirectory }.ShowAsync(this));
-
+        public async Task OpenDirectoryButtonClick() => OpenDirectory(await new OpenFolderDialog() { Directory = WorkingDirectory }.ShowAsync(this));
         public void OpenDirectory(string directory)
         {
             WorkingDirectory = directory;
@@ -51,9 +49,7 @@ namespace BFR
             Files.ReplaceAll(new List<FileModel>(Files));
         }
 
-        public MainWindow() => 
-            InitializeComponent();
-
+        public MainWindow() => InitializeComponent();
         private void InitializeComponent()
         {
             AvaloniaXamlLoader.Load(this);
diff --git a/BFR/Operations/Operation.cs b/BFR/Operations/Operation.cs
new file mode 100644
index 0000000..302ca93
--- /dev/null
+++ b/BFR/Operations/Operation.cs
@@ -0,0 +1,29 @@
+using System;
+using System.Collections.Generic;
+
+using Avalonia;
+
+using BFR.DataModels;
+
+namespace BFR.Operations
+{
+    public abstract class Operation : AvaloniaObject
+    {
+        // Needs to be an avalonia property to update the UI with with any potential error.
+        public AvaloniaProperty<string> errorProperty = AvaloniaProperty.Register<Operation, string>(nameof(Error), defaultValue: "");
+        public string Error { get => GetValue(errorProperty); set => SetValue(errorProperty, value); }
+        public bool IsEnabled { get; set; } = true;
+        public abstract string Name { get; }
+        public abstract string Description { get; }
+        public abstract OperationType OperationType { get; }
+
+        protected abstract void ApplyToInternal(List<FileModel> files);
+        
+        // Updates the UI with the appropriate error if the operation fails
+        public void ApplyTo(List<FileModel> files)
+        {
+            try { ApplyToInternal(files); Error = ""; }
+            catch (Exception e) { Error = e.Message; }
+        }
+    }
+}
diff --git a/BFR/Operations/OperationType.cs b/BFR/Operations/OperationType.cs
new file mode 100644
index 0000000..20a353c
--- /dev/null
+++ b/BFR/Operations/OperationType.cs
@@ -0,0 +1,20 @@
+using System;
+
+namespace BFR.Operations
+{
+    public class OperationType
+    {
+        public string Name { get; }
+        public string Description { get; }
+        public Func<Operation> Create { get; }
+
+        internal static OperationType Make<T>() where T : Operation, new()
+        {
+            var pilot = new T();
+            return new OperationType(pilot.Name, pilot.Description, () => new T());
+        }
+
+        private OperationType(string name, string description, Func<Operation> create) =>
+            (Name, Description, Create) = (name, description, create);
+    }
+}
diff --git a/BFR/Operations/Overwrite.cs b/BFR/Operations/Overwrite.cs
new file mode 100644
index 0000000..96153bb
--- /dev/null
+++ b/BFR/Operations/Overwrite.cs
@@ -0,0 +1,27 @@
+using System.Collections.Generic;
+
+using BFR.DataModels;
+
+namespace BFR.Operations
+{
+    public class Overwrite : Operation
+    {
+        // Operation Info
+        public override string Name => nameof(Overwrite);
+        public override string Description => "Overwrites all file names. To produce a valid result this has to be combined with numbering.";
+        public override OperationType OperationType { get; } = OperationType.Make<Overwrite>();
+
+        // Operation Parameters
+        public string Replacement { get; set; } = "";
+        public bool FullName { get; set; } = false;
+
+        protected override void ApplyToInternal(List<FileModel> files)
+        {
+            // Fail conditions: No fail conditions
+            // Apply Operation
+            foreach (var file in files)
+                if (FullName) file.FullName = Replacement;
+                else file.Name = Replacement;
+        }
+    }
+}