fix IOExceptions that could occur while searching

src/AddIns/Misc/SearchAndReplace/Project/Engine/SearchManager.cs

@@ -62,6 +62,7 @@ namespace SearchAndReplace
 			
 			public ITextBuffer Create(FileName fileName)
 			{
+				try {
 					foreach (FileName name in viewContentFileNamesCollection) {
 						if (FileUtility.IsEqualFileName(name, fileName)) {
 							ITextBuffer buffer = WorkbenchSingleton.SafeThreadFunction(ReadFile, fileName);
@@ -69,7 +70,6 @@ namespace SearchAndReplace
 								return buffer;
 						}
 					}
-				try {
 					using (Stream stream = new FileStream(fileName, FileMode.Open, FileAccess.Read)) {
 						if (MimeTypeDetection.FindMimeType(stream).StartsWith("text/")) {
 							stream.Position = 0;