diff --git a/Les Horaires/src/main/java/com/amine/horaires/ShopDisplay.java b/Les Horaires/src/main/java/com/amine/horaires/ShopDisplay.java
index ae14cab..89ca5a6 100644
--- a/Les Horaires/src/main/java/com/amine/horaires/ShopDisplay.java	
+++ b/Les Horaires/src/main/java/com/amine/horaires/ShopDisplay.java	
@@ -9,6 +9,7 @@ import android.net.NetworkInfo;
 import android.net.Uri;
 import android.os.AsyncTask;
 import android.os.Bundle;
+import android.util.Log;
 import android.view.Menu;
 import android.view.MenuInflater;
 import android.view.View;
@@ -163,28 +164,37 @@ public class ShopDisplay extends OptionsActivity {
 
         @Override
         protected Bitmap doInBackground(String... params) {
-            URL url;
+            URL url = null;
             Bitmap b = null;
+            HttpURLConnection conn = null;
+            InputStream is = null;
             try {
                 url = new URL(params[0]);
-                HttpURLConnection conn = (HttpURLConnection) url.openConnection();
+                conn = (HttpURLConnection) url.openConnection();
                 conn.setRequestMethod("GET");
                 conn.setDoInput(true);
                 conn.connect();
 
-                InputStream is = conn.getInputStream();
+                is = conn.getInputStream();
                 b = BitmapFactory.decodeStream(is);
 
-
                 is.close();
                 conn.disconnect();
 
             } catch (MalformedURLException e) {
-                e.printStackTrace();
+                Log.e("ShopDisplay", "The API doesn't respond correctly. Asked url was "+url.toString(), e);
             } catch (ProtocolException e) {
-                e.printStackTrace();
+                Log.e("ShopDisplay", "The protocol doesn't seems to be HTTP. Url was " + url.toString(), e);
             } catch (IOException e) {
-                e.printStackTrace();
+                Log.e("ShopDisplay", "The image seems to be corrupt. Url was " + url.toString(), e);
+            } finally {
+                // Makes sure that the InputStream is closed after the app is finished using it.
+                if (is != null)
+                    try {
+                        is.close();
+                    } catch (IOException e) {}
+                if (conn != null)
+                    conn.disconnect();
             }
             return b;
         }
@@ -201,9 +211,9 @@ public class ShopDisplay extends OptionsActivity {
             HttpURLConnection conn = null;
             InputStream is = null;
             String contentAsString = "";
-
+            URL url = null;
             try {
-                URL url = params[0];
+                url = params[0];
                 conn = (HttpURLConnection) url.openConnection();
                 conn.setReadTimeout(10000 /* milliseconds */);
                 conn.setConnectTimeout(15000 /* milliseconds */);
@@ -221,19 +231,17 @@ public class ShopDisplay extends OptionsActivity {
                     contentAsString = contentAsString + reader.nextLine();
                 }
             } catch (MalformedURLException e) {
-                e.printStackTrace();
+                Log.e("ShopDisplay", "The API doesn't respond correctly. Asked url was " + url.toString(), e);
             } catch (ProtocolException e) {
-                e.printStackTrace();
+                Log.e("ShopDisplay", "The protocol doesn't seems to be HTTP. Url was " + url.toString(), e);
             } catch (IOException e) {
-                e.printStackTrace();
+                Log.e("ShopDisplay", "The API response is not readable. Url was " + url.toString(), e);
             } finally {
                 // Makes sure that the InputStream is closed after the app is finished using it.
                 if (is != null)
                     try {
                         is.close();
-                    } catch (IOException e) {
-                        e.printStackTrace();
-                    }
+                    } catch (IOException e) {}
                 if (conn != null)
                     conn.disconnect();
             }
diff --git a/Les Horaires/src/main/java/com/amine/horaires/ShopSearch.java b/Les Horaires/src/main/java/com/amine/horaires/ShopSearch.java
index 9bde0b8..b5b594f 100644
--- a/Les Horaires/src/main/java/com/amine/horaires/ShopSearch.java	
+++ b/Les Horaires/src/main/java/com/amine/horaires/ShopSearch.java	
@@ -4,6 +4,7 @@ import android.content.Intent;
 import android.location.Location;
 import android.os.AsyncTask;
 import android.os.Bundle;
+import android.util.Log;
 import android.view.View;
 import android.widget.Button;
 import android.widget.EditText;
@@ -82,9 +83,9 @@ public class ShopSearch extends OptionsActivity {
             HttpURLConnection conn = null;
             InputStream is = null;
             String contentAsString = "";
-
+            URL url = null;
             try {
-                URL url = params[0];
+                url = params[0];
                 conn = (HttpURLConnection) url.openConnection();
                 conn.setReadTimeout(10000 /* milliseconds */);
                 conn.setConnectTimeout(15000 /* milliseconds */);
@@ -102,19 +103,17 @@ public class ShopSearch extends OptionsActivity {
                     contentAsString = contentAsString + reader.nextLine();
                 }
             } catch (MalformedURLException e) {
-                e.printStackTrace();
+                Log.e("ShopSearch", "The API doesn't respond correctly. Asked url was " + url.toString(), e);
             } catch (ProtocolException e) {
-                e.printStackTrace();
+                Log.e("ShopSearch", "The protocol doesn't seems to be HTTP. Url was " + url.toString(), e);
             } catch (IOException e) {
-                e.printStackTrace();
+                Log.e("ShopSearch", "The API response is not readable. Url was " + url.toString(), e);
             } finally {
                 // Makes sure that the InputStream is closed after the app is finished using it.
                 if (is != null)
                     try {
                         is.close();
-                    } catch (IOException e) {
-                        e.printStackTrace();
-                    }
+                    } catch (IOException e) {}
                 if (conn != null)
                     conn.disconnect();
             }
diff --git a/Les Horaires/src/main/java/com/amine/horaires/ShopUpdate.java b/Les Horaires/src/main/java/com/amine/horaires/ShopUpdate.java
index 09c35e1..d2e3c19 100644
--- a/Les Horaires/src/main/java/com/amine/horaires/ShopUpdate.java	
+++ b/Les Horaires/src/main/java/com/amine/horaires/ShopUpdate.java	
@@ -2,6 +2,7 @@ package com.amine.horaires;
 
 import android.os.AsyncTask;
 import android.os.Bundle;
+import android.util.Log;
 import android.view.View;
 import android.widget.Button;
 import android.widget.ListView;
@@ -93,9 +94,9 @@ public class ShopUpdate extends OptionsActivity {
             HttpURLConnection conn = null;
             InputStream is = null;
             String contentAsString = "";
-
+            URL url = null;
             try {
-                URL url = params[0];
+                url = params[0];
                 conn = (HttpURLConnection) url.openConnection();
                 conn.setReadTimeout(10000 /* milliseconds */);
                 conn.setConnectTimeout(15000 /* milliseconds */);
@@ -115,19 +116,17 @@ public class ShopUpdate extends OptionsActivity {
                     contentAsString = contentAsString + reader.nextLine();
                 }
             } catch (MalformedURLException e) {
-                e.printStackTrace();
+                Log.e("ShopUpdate", "The API doesn't respond correctly. Asked url was " + url.toString(), e);
             } catch (ProtocolException e) {
-                e.printStackTrace();
+                Log.e("ShopUpdate", "The protocol doesn't seems to be HTTP. Url was " + url.toString(), e);
             } catch (IOException e) {
-                e.printStackTrace();
+                Log.e("ShopUpdate", "The API response is not readable. Url was " + url.toString(), e);
             } finally {
                 // Makes sure that the InputStream is closed after the app is finished using it.
                 if (is != null)
                     try {
                         is.close();
-                    } catch (IOException e) {
-                        e.printStackTrace();
-                    }
+                    } catch (IOException e) {}
                 if (conn != null)
                     conn.disconnect();
             }
diff --git a/Les Horaires/src/main/java/com/amine/horaires/util/Parseur.java b/Les Horaires/src/main/java/com/amine/horaires/util/Parseur.java
index 3cdd4f2..21ab2e9 100644
--- a/Les Horaires/src/main/java/com/amine/horaires/util/Parseur.java	
+++ b/Les Horaires/src/main/java/com/amine/horaires/util/Parseur.java	
@@ -1,17 +1,16 @@
 package com.amine.horaires.util;
 
+import android.util.Log;
 import com.amine.horaires.models.Shop;
 import org.xml.sax.Attributes;
 import org.xml.sax.InputSource;
 import org.xml.sax.SAXException;
 import org.xml.sax.helpers.DefaultHandler;
 
+import javax.xml.parsers.ParserConfigurationException;
 import javax.xml.parsers.SAXParser;
 import javax.xml.parsers.SAXParserFactory;
-import java.io.ByteArrayInputStream;
-import java.io.InputStream;
-import java.io.InputStreamReader;
-import java.io.Reader;
+import java.io.*;
 import java.util.ArrayList;
 
 /**
@@ -215,8 +214,12 @@ public class Parseur {
 
             saxParser.parse(is, handler);
 
-        } catch (Exception e) {
-            e.printStackTrace();
+        } catch (ParserConfigurationException e) {
+            Log.wtf("Parseur", "The parser configuration seems to be unexpected.", e);
+        } catch (IOException e) {
+            Log.e("Parseur", "API response seems to be unexpected.", e);
+        } catch (SAXException e) {
+            Log.e("Parseur", "Impossible to parse API response.", e);
         }
 
         return listeMagasins;
diff --git a/Les Horaires/src/main/java/com/amine/horaires/util/Utils.java b/Les Horaires/src/main/java/com/amine/horaires/util/Utils.java
index fb2de9f..5855140 100644
--- a/Les Horaires/src/main/java/com/amine/horaires/util/Utils.java	
+++ b/Les Horaires/src/main/java/com/amine/horaires/util/Utils.java	
@@ -1,5 +1,7 @@
 package com.amine.horaires.util;
 
+import android.util.Log;
+
 import java.io.UnsupportedEncodingException;
 import java.net.MalformedURLException;
 import java.net.URL;
@@ -13,10 +15,10 @@ public class Utils {
                     + "&get=shops" + "&loc=" + URLEncoder.encode(location, "ISO-8859-1")
                     + "&name=" + URLEncoder.encode(name, "ISO-8859-1"));
         } catch (MalformedURLException e) {
-            e.printStackTrace();
+            Log.e("Utils", "URL was malformed.", e);
             return null;
         } catch (UnsupportedEncodingException e) {
-            e.printStackTrace();
+            Log.e("Utils", "Fail to encode the URL", e);
             return null;
         }
     }
@@ -30,10 +32,10 @@ public class Utils {
                     + "&get=shops" + "&lng=" + lng + "&lat=" + lat + "&name="
                     + URLEncoder.encode(name, "ISO-8859-1") + "&order=distance");
         } catch (MalformedURLException e) {
-            e.printStackTrace();
+            Log.e("Utils", "URL was malformed.", e);
             return null;
         } catch (UnsupportedEncodingException e) {
-            e.printStackTrace();
+            Log.e("Utils", "Fail to encode the URL", e);
             return null;
         }
     }
@@ -45,7 +47,7 @@ public class Utils {
                     + Configuration.key + "&h=" + Configuration.hashtag
                     + "&get=shop" + "&id=" + idPoi);
         } catch (MalformedURLException e) {
-            e.printStackTrace();
+            Log.e("Utils", "URL was malformed.", e);
             return null;
         }
     }
@@ -57,7 +59,7 @@ public class Utils {
                     + Configuration.key + "&h=" + Configuration.hashtag
                     + "&get=edit" + "&id=" + idPoi + periodsString);
         } catch (MalformedURLException e) {
-            e.printStackTrace();
+            Log.e ("Utils", "URL was malformed.", e);
             return null;
         }
     }