diff -r 8d73bff730a7 -r eb1ecb37c6b7 src/AttributeFinder.h
--- a/src/AttributeFinder.h	Wed Jan 16 18:16:07 2019 +0100
+++ b/src/AttributeFinder.h	Wed Jan 16 18:19:50 2019 +0100
@@ -34,6 +34,9 @@
 using namespace relpipe::writer;
 
 class AttributeFinder {
+protected:
+	fs::path currentFile;
+	string currentFileRaw;
 public:
 
 	/**
@@ -47,14 +50,21 @@
 	/**
 	 * Writing of the record for current file is starting.
 	 * Following writeField() calls are related to this file.
-	 * @param file
+	 * @param file path to the file
+	 * @param fileRaw raw file name as it was on the input
 	 */
-	virtual void startFile(const fs::path& file) = 0;
+	virtual void startFile(const fs::path& file, const string& fileRaw) {
+		currentFile = file;
+		currentFileRaw = fileRaw;
+	}
 
 	/**
 	 * Writing of the record for current file is finished. All resources linked to this file should be released.
 	 */
-	virtual void endFile() = 0;
+	virtual void endFile() {
+		currentFile.clear();
+		currentFileRaw.clear();
+	}
 
 	/**
 	 * Writes field attribute(s). The attribute count must match with count of AttributeMetadata returned in toMetadata().