Code style fixes.

Aaru.Images/CDRWin/CDRWin.cs

@@ -40,7 +40,7 @@ using Aaru.Decoders.CD;
 namespace Aaru.DiscImages
 {
     // TODO: Implement track flags
-    public partial class CdrWin : IWritableOpticalImage, IVerifiableImage
+    public sealed partial class CdrWin : IWritableOpticalImage, IVerifiableImage
     {
         IFilter      _cdrwinFilter;
         StreamReader _cueStream;

Aaru.Images/CDRWin/Constants.cs

@@ -32,7 +32,7 @@
 
 namespace Aaru.DiscImages
 {
-    public partial class CdrWin
+    public sealed partial class CdrWin
     {
         // Type for FILE entity
         /// <summary>Data as-is in little-endian</summary>

Aaru.Images/CDRWin/Helpers.cs

@@ -36,7 +36,7 @@ using Aaru.CommonTypes.Structs;
 
 namespace Aaru.DiscImages
 {
-    public partial class CdrWin
+    public sealed partial class CdrWin
     {
         static int CdrWinMsfToLba(string msf)
         {

Aaru.Images/CDRWin/Identify.cs

@@ -38,7 +38,7 @@ using Aaru.Console;
 
 namespace Aaru.DiscImages
 {
-    public partial class CdrWin
+    public sealed partial class CdrWin
     {
         // Due to .cue format, this method must parse whole file, ignoring errors (those will be thrown by OpenImage()).
         public bool Identify(IFilter imageFilter)

Aaru.Images/CDRWin/Properties.cs

@@ -39,7 +39,7 @@ using Schemas;
 
 namespace Aaru.DiscImages
 {
-    public partial class CdrWin
+    public sealed partial class CdrWin
     {
         public OpticalImageCapabilities OpticalCapabilities => OpticalImageCapabilities.CanStoreAudioTracks    |
                                                                OpticalImageCapabilities.CanStoreDataTracks     |

Aaru.Images/CDRWin/Read.cs

@@ -49,7 +49,7 @@ using TrackType = Aaru.CommonTypes.Enums.TrackType;
 
 namespace Aaru.DiscImages
 {
-    public partial class CdrWin
+    public sealed partial class CdrWin
     {
         public bool Open(IFilter imageFilter)
         {

Aaru.Images/CDRWin/Structs.cs

@@ -39,7 +39,7 @@ using Aaru.CommonTypes.Structs;
 
 namespace Aaru.DiscImages
 {
-    public partial class CdrWin
+    public sealed partial class CdrWin
     {
         struct CdrWinTrackFile
         {

Aaru.Images/CDRWin/Verify.cs

@@ -40,7 +40,7 @@ using Aaru.Console;
 
 namespace Aaru.DiscImages
 {
-    public partial class CdrWin
+    public sealed partial class CdrWin
     {
         public bool? VerifyMediaImage()
         {

Aaru.Images/CDRWin/Write.cs

@@ -42,7 +42,7 @@ using Schemas;
 
 namespace Aaru.DiscImages
 {
-    public partial class CdrWin
+    public sealed partial class CdrWin
     {
         public bool Create(string path, MediaType mediaType, Dictionary<string, string> options, ulong sectors,
                            uint sectorSize)
@@ -86,7 +86,9 @@ namespace Aaru.DiscImages
             // TODO: Separate tracks
             try
             {
-                _writingBaseName  = Path.Combine(Path.GetDirectoryName(path), Path.GetFileNameWithoutExtension(path));
+                _writingBaseName =
+                    Path.Combine(Path.GetDirectoryName(path) ?? "", Path.GetFileNameWithoutExtension(path));
+
                 _descriptorStream = new StreamWriter(path, false, Encoding.ASCII);
             }
             catch(IOException e)