diff --git a/LabJavaIO/src/main/java/ch/heigvd/res/labio/impl/Application.java b/LabJavaIO/src/main/java/ch/heigvd/res/labio/impl/Application.java
index 25e835c4..6742067f 100644
--- a/LabJavaIO/src/main/java/ch/heigvd/res/labio/impl/Application.java
+++ b/LabJavaIO/src/main/java/ch/heigvd/res/labio/impl/Application.java
@@ -9,17 +9,16 @@
 import ch.heigvd.res.labio.quotes.QuoteClient;
 import org.apache.commons.io.FileUtils;
 
-import java.io.File;
-import java.io.IOException;
-import java.io.StringWriter;
-import java.io.Writer;
+import java.io.*;
 import java.net.URISyntaxException;
+import java.util.List;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
 /**
  *
  * @author Olivier Liechti
+ * Modifed by Blanc Jean-Luc
  */
 public class Application implements IApplication {
 
@@ -98,6 +97,7 @@ public void fetchAndStoreQuotes(int numberOfQuotes) throws IOException {
          * one method provided by this class, which is responsible for storing the content of the
          * quote in a text file (and for generating the directories based on the tags).
          */
+        storeQuote(quote, "quote-" + i + ".utf8");
         LOG.info("Received a new joke with " + quote.getTags().size() + " tags.");
         for (String tag : quote.getTags()) {
           LOG.info("> " + tag);
@@ -133,7 +133,22 @@ void clearOutputDirectory() throws IOException {
    * @throws IOException 
    */
   void storeQuote(Quote quote, String filename) throws IOException {
-    throw new UnsupportedOperationException("The student has not implemented this method yet.");
+    //throw new UnsupportedOperationException("The student has not implemented this method yet.");
+
+    List<String> tags = quote.getTags();
+    String quoteText = quote.getQuote();
+
+    String pathToRep = WORKSPACE_DIRECTORY;
+    for(String tag : tags){
+      pathToRep += "/" + tag;
+    }
+    File fileDir = new File(pathToRep);
+    fileDir.mkdirs();
+
+    pathToRep += "/" + filename;
+    FileWriter fileWriter = new FileWriter(pathToRep);
+    fileWriter.write(quoteText);
+    fileWriter.close();
   }
   
   /**
@@ -150,6 +165,12 @@ public void visit(File file) {
          * of the the IFileVisitor interface inline. You just have to add the body of the visit method, which should
          * be pretty easy (we want to write the filename, including the path, to the writer passed in argument).
          */
+        try{
+          writer.write(file.getPath() + "\n");
+        }
+        catch(IOException e){
+          e.printStackTrace();
+        }
       }
     });
   }
diff --git a/LabJavaIO/src/main/java/ch/heigvd/res/labio/impl/Utils.java b/LabJavaIO/src/main/java/ch/heigvd/res/labio/impl/Utils.java
index c8a3a5ad..81cdbc6e 100644
--- a/LabJavaIO/src/main/java/ch/heigvd/res/labio/impl/Utils.java
+++ b/LabJavaIO/src/main/java/ch/heigvd/res/labio/impl/Utils.java
@@ -5,6 +5,8 @@
 /**
  *
  * @author Olivier Liechti
+ *
+ * Modified by Blanc Jean-Luc
  */
 public class Utils {
 
@@ -20,7 +22,28 @@ public class Utils {
    * contain any line separator, then the first element is an empty string.
    */
   public static String[] getNextLine(String lines) {
-    throw new UnsupportedOperationException("The student has not implemented this method yet.");
+
+    //First we want to know the index of the line separators
+    int indexR = lines.indexOf("\r");//MAC OS
+    int indexN = lines.indexOf("\n");//UNIX
+    int indexRN = lines.indexOf("\r\n");//WINDOWS
+
+    //Then we want to check if those indexes exist or not,
+    // if the index = -1 then the line separator is not in the "lines" string
+    // Once we know if they exist, we want to start forming our return element String[]
+    // and actually return it if the line separator exists
+    // we return something too if we don't find any line separators
+    //here we add 2 to the index because the line separator is 2 characters
+    if(indexRN != -1)
+      return new String[]{lines.substring(0, indexRN + 2), lines.substring(indexRN + 2)};
+
+    if(indexR != -1)
+      return new String[]{lines.substring(0, indexR + 1), lines.substring(indexR + 1)};
+
+    if(indexN != -1)
+      return new String[]{lines.substring(0, indexN + 1), lines.substring(indexN + 1)};
+
+    return new String[]{"", lines};
   }
 
 }
diff --git a/LabJavaIO/src/main/java/ch/heigvd/res/labio/impl/explorers/DFSFileExplorer.java b/LabJavaIO/src/main/java/ch/heigvd/res/labio/impl/explorers/DFSFileExplorer.java
index b97c4a72..03f72341 100644
--- a/LabJavaIO/src/main/java/ch/heigvd/res/labio/impl/explorers/DFSFileExplorer.java
+++ b/LabJavaIO/src/main/java/ch/heigvd/res/labio/impl/explorers/DFSFileExplorer.java
@@ -4,6 +4,7 @@
 import ch.heigvd.res.labio.interfaces.IFileVisitor;
 
 import java.io.File;
+import java.util.Arrays;
 
 /**
  * This implementation of the IFileExplorer interface performs a depth-first
@@ -12,12 +13,32 @@
  * files in the directory and then moves into the subdirectories.
  * 
  * @author Olivier Liechti
+ *
+ * Modified by Blanc Jean-Luc
  */
 public class DFSFileExplorer implements IFileExplorer {
 
   @Override
-  public void explore(File rootDirectory, IFileVisitor vistor) {
-    throw new UnsupportedOperationException("The student has not implemented this method yet.");
+  public void explore(File rootDirectory, IFileVisitor visitor) {
+
+    //Checking that rootDirectory does exist before going further
+    if(rootDirectory == null){
+      return;
+    }
+
+    //if it exists, then we can visit it
+    visitor.visit(rootDirectory);
+
+    //if the file is actually a directory, then we need to go further in
+    if(rootDirectory.isDirectory()){
+      //we create an array that contains the directory content, we then sort this content in order to display it
+      File[] folderContent =  rootDirectory.listFiles();
+      Arrays.sort(folderContent);
+      //adding recursive here
+      for(File file : folderContent){
+        explore(file, visitor);
+      }
+    }
   }
 
 }
diff --git a/LabJavaIO/src/main/java/ch/heigvd/res/labio/impl/filters/FileNumberingFilterWriter.java b/LabJavaIO/src/main/java/ch/heigvd/res/labio/impl/filters/FileNumberingFilterWriter.java
index 976c9462..72ceb37f 100644
--- a/LabJavaIO/src/main/java/ch/heigvd/res/labio/impl/filters/FileNumberingFilterWriter.java
+++ b/LabJavaIO/src/main/java/ch/heigvd/res/labio/impl/filters/FileNumberingFilterWriter.java
@@ -11,13 +11,16 @@
  * It then sends the line number and a tab character, before resuming the write
  * process.
  *
- * Hello\n\World -> 1\Hello\n2\tWorld
+ * Hello\n\World -> 1\tHello\n2\tWorld
  *
  * @author Olivier Liechti
+ * Modified by Blanc Jean-Luc
  */
 public class FileNumberingFilterWriter extends FilterWriter {
 
   private static final Logger LOG = Logger.getLogger(FileNumberingFilterWriter.class.getName());
+  private int counter = 0;
+  private int lastC = '\0';
 
   public FileNumberingFilterWriter(Writer out) {
     super(out);
@@ -25,17 +28,42 @@ public FileNumberingFilterWriter(Writer out) {
 
   @Override
   public void write(String str, int off, int len) throws IOException {
-    throw new UnsupportedOperationException("The student has not implemented this method yet.");
+    for(int i = off; i < len+off; i++){
+      write(str.charAt(i));
+    }
   }
 
   @Override
   public void write(char[] cbuf, int off, int len) throws IOException {
-    throw new UnsupportedOperationException("The student has not implemented this method yet.");
+    for(int i = off; i < len+off; i++){
+      write(cbuf[i]);
+    }
   }
 
   @Override
   public void write(int c) throws IOException {
-    throw new UnsupportedOperationException("The student has not implemented this method yet.");
+    //here we want to check if we are on the first line, if that's not the case then we want to check
+    // the various "c" cases regarding the OS
+    // UNIX = \n      MAC OS = \r     Windows = \r\n
+    // after that we write down the counter, insert a tab
+    // then we write down the char (while not forgetting to save the last char
+    if(counter == 0){
+      out.write(++counter + "\t");
+    }
+    else if(lastC == '\r' && c != '\n'){
+      out.write(++counter + "\t");
+    }
+
+    out.write(c);
+
+    if(c == '\n' && lastC == '\r'){
+      out.write(++counter + "\t");
+    }
+    else if(c == '\n' && lastC != '\r'){
+      out.write(++counter + "\t");
+    }
+
+    lastC = c;
   }
 
 }
diff --git a/LabJavaIO/src/main/java/ch/heigvd/res/labio/impl/filters/UpperCaseFilterWriter.java b/LabJavaIO/src/main/java/ch/heigvd/res/labio/impl/filters/UpperCaseFilterWriter.java
index 0f41a5dd..5b9ecbc0 100644
--- a/LabJavaIO/src/main/java/ch/heigvd/res/labio/impl/filters/UpperCaseFilterWriter.java
+++ b/LabJavaIO/src/main/java/ch/heigvd/res/labio/impl/filters/UpperCaseFilterWriter.java
@@ -3,11 +3,16 @@
 import java.io.FilterWriter;
 import java.io.IOException;
 import java.io.Writer;
+import java.util.Locale;
 
 /**
  *
  * @author Olivier Liechti
+ *
+ * Modified by Blanc Jean-Luc
  */
+
+//basically here we only have to implement last class methods using "super" while making sure we put everything to upper case
 public class UpperCaseFilterWriter extends FilterWriter {
   
   public UpperCaseFilterWriter(Writer wrappedWriter) {
@@ -16,17 +21,20 @@ public UpperCaseFilterWriter(Writer wrappedWriter) {
 
   @Override
   public void write(String str, int off, int len) throws IOException {
-    throw new UnsupportedOperationException("The student has not implemented this method yet.");
+    super.write(str.toUpperCase(), off, len);
   }
 
   @Override
   public void write(char[] cbuf, int off, int len) throws IOException {
-    throw new UnsupportedOperationException("The student has not implemented this method yet.");
+    for(int i = 0; i < cbuf.length; i++){
+      cbuf[i] = Character.toUpperCase(cbuf[i]);
+    }
+    super.write(cbuf, off, len);
   }
 
   @Override
   public void write(int c) throws IOException {
-    throw new UnsupportedOperationException("The student has not implemented this method yet.");
+    super.write(Character.toUpperCase(c));
   }
 
 }
diff --git a/LabJavaIO/src/main/java/ch/heigvd/res/labio/impl/transformers/CompleteFileTransformer.java b/LabJavaIO/src/main/java/ch/heigvd/res/labio/impl/transformers/CompleteFileTransformer.java
index 4beca482..d74c04e0 100644
--- a/LabJavaIO/src/main/java/ch/heigvd/res/labio/impl/transformers/CompleteFileTransformer.java
+++ b/LabJavaIO/src/main/java/ch/heigvd/res/labio/impl/transformers/CompleteFileTransformer.java
@@ -1,6 +1,8 @@
 package ch.heigvd.res.labio.impl.transformers;
 
 import java.io.Writer;
+import ch.heigvd.res.labio.impl.filters.FileNumberingFilterWriter;
+import ch.heigvd.res.labio.impl.filters.UpperCaseFilterWriter;
 
 /**
  * This class returns a writer decorated with two filters: an instance of
@@ -10,21 +12,20 @@
  * beginning of each line.
  * 
  * @author Olivier Liechti
+ *
+ * Modified by Blanc Jean-Luc
  */
 public class CompleteFileTransformer extends FileTransformer {
 
   @Override
   public Writer decorateWithFilters(Writer writer) {
-    if (true) {
-      throw new UnsupportedOperationException("The student has not implemented this method yet.");
-    }
     /*
      * If you uncomment the following line (and get rid of th 3 previous lines...), you will restore the decoration 
      * of the writer (connected to the file. You can see that you first decorate the writer with an UpperCaseFilterWriter, which you then
      * decorate with a FileNumberingFilterWriter. The resulting writer is used by the abstract class to write the characters read from the
      * input files. So, the input is first prefixed with line numbers, then transformed to uppercase, then sent to the output file.f
      */
-    //writer = new FileNumberingFilterWriter(new UpperCaseFilterWriter(writer));
+    writer = new FileNumberingFilterWriter(new UpperCaseFilterWriter(writer));
     return writer; 
   }
 
diff --git a/LabJavaIO/src/main/java/ch/heigvd/res/labio/impl/transformers/FileTransformer.java b/LabJavaIO/src/main/java/ch/heigvd/res/labio/impl/transformers/FileTransformer.java
index bde833e8..49b35a51 100644
--- a/LabJavaIO/src/main/java/ch/heigvd/res/labio/impl/transformers/FileTransformer.java
+++ b/LabJavaIO/src/main/java/ch/heigvd/res/labio/impl/transformers/FileTransformer.java
@@ -18,6 +18,8 @@
  * a list of filters and decorates the output writer with them.
  * 
  * @author Olivier Liechti
+ *
+ * Modified by Blanc Jean-Luc
  */
 public abstract class FileTransformer implements IFileVisitor {
 
@@ -47,11 +49,11 @@ public void visit(File file) {
       Writer writer = new OutputStreamWriter(new FileOutputStream(file.getPath()+ ".out"), StandardCharsets.UTF_8); // the bug fix by teacher
       writer = decorateWithFilters(writer);
 
-      /*
-       * There is a missing piece here: you have an input reader and an ouput writer (notice how the 
-       * writer has been decorated by the concrete subclass!). You need to write a loop to read the
-       * characters and write them to the writer.
-       */
+
+      int c; //character we want to read and write
+      while((c = reader.read()) != -1){ //-1 here means end of flux
+        writer.write(c);
+      }
       
       reader.close();
       writer.flush();
diff --git a/LabJavaIO/src/main/java/ch/heigvd/res/labio/impl/transformers/NoOpFileTransformer.java b/LabJavaIO/src/main/java/ch/heigvd/res/labio/impl/transformers/NoOpFileTransformer.java
index 5971a302..9ffebb56 100644
--- a/LabJavaIO/src/main/java/ch/heigvd/res/labio/impl/transformers/NoOpFileTransformer.java
+++ b/LabJavaIO/src/main/java/ch/heigvd/res/labio/impl/transformers/NoOpFileTransformer.java
@@ -8,19 +8,14 @@
  * the content of the input file into the output file.
  * 
  * @author Olivier Liechti
+ *
+ * Modified by Blanc Jean-Luc
  */
 public class NoOpFileTransformer extends FileTransformer {
 
   @Override
   public Writer decorateWithFilters(Writer writer) {
-    throw new UnsupportedOperationException("The student has not implemented this method yet.");
-    /*
-     * The NoOpFileTransformer does not apply any transformation of the character stream
-     * (no uppercase, no line number, etc.). So, we don't need to decorate the writer connected to
-     * the output file at all. Just uncomment the following line and get rid of the UnsupportedOperationException and
-     * you will be all set.
-     */
-    //return writer;
+    return writer;
   }
 
 }