diff --git a/owlps-positioning/Makefile b/owlps-positioning/Makefile
index 6d3d7ea..acd9aff 100644
--- a/owlps-positioning/Makefile
+++ b/owlps-positioning/Makefile
@@ -55,6 +55,7 @@ OBJ_LIST = \
 	realposition.o \
 	configuration.o \
 	userinterface.o \
+	textfilewriter.o \
 	output.o \
 	outputterminal.o \
 	outputcsv.o \
@@ -64,7 +65,6 @@ OBJ_LIST = \
 	inputlogcsv.o
 OBJ_NOTEST_LIST = \
 	posexcept.o \
-	outputfilemedium.o \
 	inputmedium.o
 INTERFACES_LIST = \
 	inputlogmedium.hh \
@@ -129,7 +129,7 @@ calibrationrequest.o: \
 	$(OBJ_DIR)/request.o \
 	$(OBJ_DIR)/referencepoint.o \
 	$(OBJ_DIR)/direction.o
-outputfilemedium.o: \
+textfilewriter.o: \
 	$(OBJ_DIR)/posexcept.o
 inputcsv.o: \
 	$(OBJ_DIR)/inputmedium.o \
@@ -151,7 +151,7 @@ outputterminal.o: \
 	$(OBJ_DIR)/result.o
 outputcsv.o: \
 	$(SRC_DIR)/outputmedium.hh \
-	$(OBJ_DIR)/outputfilemedium.o \
+	$(OBJ_DIR)/textfilewriter.o \
 	$(OBJ_DIR)/result.o
 output.o: \
 	$(OBJ_DIR)/outputterminal.o \
diff --git a/owlps-positioning/src/inputlogcsv.hh b/owlps-positioning/src/inputlogcsv.hh
index f5984fc..88ff843 100644
--- a/owlps-positioning/src/inputlogcsv.hh
+++ b/owlps-positioning/src/inputlogcsv.hh
@@ -2,20 +2,22 @@
 #define _OWLPS_POSITIONING_INPUTLOGCSV_HH_
 
 #include "inputlogmedium.hh"
-#include "outputfilemedium.hh"
+#include "textfilewriter.hh"
 
 /// Log \link Request requests \endlink to a CSV file
 /**
  * CSV format is the same as the one read by InputCSV.
  */
-class InputLogCSV: public InputLogMedium, public OutputFileMedium
+class InputLogCSV: public InputLogMedium
 {
 protected:
+  TextFileWriter file ;
+
   const std::string request_to_csv(const Request &request) const ;
 
 public:
   InputLogCSV(const std::string &filename):
-    OutputFileMedium(filename) {}
+    file(filename) {}
 
   /** @name Operations */
   //@{
@@ -30,7 +32,7 @@ public:
 
 inline bool InputLogCSV::log_request(const Request &request)
 {
-  return write_string_to_file(request_to_csv(request)) ;
+  return file.write_text(request_to_csv(request)) ;
 }
 
 
diff --git a/owlps-positioning/src/outputcsv.hh b/owlps-positioning/src/outputcsv.hh
index e06a26d..6dda9bf 100644
--- a/owlps-positioning/src/outputcsv.hh
+++ b/owlps-positioning/src/outputcsv.hh
@@ -2,21 +2,23 @@
 #define _OWLPS_POSITIONING_OUTPUTCSV_HH_
 
 #include "outputmedium.hh"
-#include "outputfilemedium.hh"
+#include "textfilewriter.hh"
 
 /// Writes a result to a CSV file
 /**
  * CSV format is:
  *   Mobile_MAC;Timestamp;X;Y;Z
  */
-class OutputCSV: public OutputMedium, public OutputFileMedium
+class OutputCSV: public OutputMedium
 {
 protected:
+  TextFileWriter file ;
+
   const std::string result_to_csv(const Result &result) ;
 
 public:
   OutputCSV(const std::string &filename):
-    OutputFileMedium(filename) {}
+    file(filename) {}
 
   void write(const Result &result) ;
 } ;
@@ -28,7 +30,7 @@ public:
 
 inline void OutputCSV::write(const Result &result)
 {
-  write_string_to_file(result_to_csv(result)) ;
+  file.write_text(result_to_csv(result)) ;
 }
 
 
diff --git a/owlps-positioning/src/outputfilemedium.hh b/owlps-positioning/src/outputfilemedium.hh
deleted file mode 100644
index 9fd4730..0000000
--- a/owlps-positioning/src/outputfilemedium.hh
+++ /dev/null
@@ -1,22 +0,0 @@
-#ifndef _OWLPS_POSITIONING_OUTPUTFILEMEDIUM_HH_
-#define _OWLPS_POSITIONING_OUTPUTFILEMEDIUM_HH_
-
-#include <string>
-#include <fstream>
-
-/// Super-class of all classes that write things to a file
-class OutputFileMedium
-{
-private:
-  std::string file_name ;
-  std::ofstream file ;
-
-protected:
-  bool write_string_to_file(const std::string &text) ;
-
-public:
-  OutputFileMedium(const std::string &_file_name) ;
-  virtual ~OutputFileMedium(void) ;
-} ;
-
-#endif // _OWLPS_POSITIONING_OUTPUTFILEMEDIUM_HH_
diff --git a/owlps-positioning/src/outputfilemedium.cc b/owlps-positioning/src/textfilewriter.cc
similarity index 62%
rename from owlps-positioning/src/outputfilemedium.cc
rename to owlps-positioning/src/textfilewriter.cc
index a163ea1..db093e0 100644
--- a/owlps-positioning/src/outputfilemedium.cc
+++ b/owlps-positioning/src/textfilewriter.cc
@@ -1,4 +1,4 @@
-#include "outputfilemedium.hh"
+#include "textfilewriter.hh"
 #include "posexcept.hh"
 
 using namespace std ;
@@ -9,11 +9,10 @@ using namespace std ;
 
 
 /**
- * Prepares the OutputFileMedium to write to a CSV file.
- * @param filename The name of the file to open.
+ * @param _file_name The name of the file to open.
  * @throw error_opening_input_file if the file cannot be opened.
  */
-OutputFileMedium::OutputFileMedium(const string &_file_name):
+TextFileWriter::TextFileWriter(const string &_file_name):
   file_name(_file_name)
 {
   file.open(file_name.c_str()) ;
@@ -22,7 +21,7 @@ OutputFileMedium::OutputFileMedium(const string &_file_name):
 }
 
 
-OutputFileMedium::~OutputFileMedium()
+TextFileWriter::~TextFileWriter()
 {
   file.close() ;
 }
@@ -36,7 +35,7 @@ OutputFileMedium::~OutputFileMedium()
  * @return true if the string has been written successfuly, or false
  * if not.
  */
-bool OutputFileMedium::write_string_to_file(const string &text)
+bool TextFileWriter::write_text(const string &text)
 {
   if (! file)
     return false ;
diff --git a/owlps-positioning/src/textfilewriter.hh b/owlps-positioning/src/textfilewriter.hh
new file mode 100644
index 0000000..cd2fff6
--- /dev/null
+++ b/owlps-positioning/src/textfilewriter.hh
@@ -0,0 +1,21 @@
+#ifndef _OWLPS_POSITIONING_TEXTFILEWRITER_HH_
+#define _OWLPS_POSITIONING_TEXTFILEWRITER_HH_
+
+#include <string>
+#include <fstream>
+
+/// Write text to a file
+class TextFileWriter
+{
+private:
+  std::string file_name ;
+  std::ofstream file ;
+
+public:
+  TextFileWriter(const std::string &_file_name) ;
+  virtual ~TextFileWriter(void) ;
+
+  bool write_text(const std::string &text) ;
+} ;
+
+#endif // _OWLPS_POSITIONING_TEXTFILEWRITER_HH_
diff --git a/owlps-positioning/tests/textfilewriter_test.hh b/owlps-positioning/tests/textfilewriter_test.hh
new file mode 100644
index 0000000..1a626ae
--- /dev/null
+++ b/owlps-positioning/tests/textfilewriter_test.hh
@@ -0,0 +1,53 @@
+#include <cxxtest/TestSuite.h>
+
+#include "textfilewriter.hh"
+
+class TextFileWriter_test: public CxxTest::TestSuite
+{
+private:
+  std::string test_file_name ;
+
+public:
+
+  TextFileWriter_test(void)
+  {
+    Stock::clear() ;
+    test_file_name = "/tmp/TextFileWriter_test_file.csv" ;
+  }
+
+
+  ~TextFileWriter_test(void)
+  {
+    TestUtil::remove_file(test_file_name) ;
+  }
+
+
+  static TextFileWriter_test* createSuite(void)
+  {
+    return new TextFileWriter_test() ;
+  }
+
+
+  static void destroySuite(TextFileWriter_test *suite)
+  {
+    delete suite ;
+  }
+
+
+  void test_textfilewriter(void)
+  {
+    TextFileWriter *textfilewriter =
+      new TextFileWriter(test_file_name) ;
+    TS_ASSERT(textfilewriter->write_text("Hello\nWorld\n")) ;
+    delete textfilewriter ;
+
+    std::ifstream input_file(test_file_name.c_str()) ;
+    std::string line ;
+    getline(input_file, line) ;
+    TS_ASSERT_EQUALS(line, "Hello") ;
+    getline(input_file, line) ;
+    TS_ASSERT_EQUALS(line, "World") ;
+    input_file.close() ;
+  }
+
+} ;