diff --git a/gclc/src/main/java/fr/bigeon/gclc/manager/ReadingRunnable.java b/gclc/src/main/java/fr/bigeon/gclc/manager/ReadingRunnable.java
index 20aea73..daf35a1 100644
--- a/gclc/src/main/java/fr/bigeon/gclc/manager/ReadingRunnable.java
+++ b/gclc/src/main/java/fr/bigeon/gclc/manager/ReadingRunnable.java
@@ -51,6 +51,8 @@ import java.util.logging.Logger;
  * @author Emmanuel Bigeon */
 public class ReadingRunnable implements Runnable {
 
+    /** The closed pipe message */
+    private static final String CLOSED_PIPE = "Closed pipe"; //$NON-NLS-1$
     /** Wait timeout */
     private static final long TIMEOUT = 1000;
     /** Class logger */
@@ -65,6 +67,7 @@ public class ReadingRunnable implements Runnable {
 
     /** Synchro object */
     private final Object lock = new Object();
+    /** The waiting status for a message */
     private boolean waiting;
 
     /** @param reader the input to read from */
@@ -122,7 +125,7 @@ public class ReadingRunnable implements Runnable {
     public String getMessage() throws IOException {
         synchronized (lock) {
             if (!running) {
-                throw new IOException("Closed pipe"); //$NON-NLS-1$
+                throw new IOException(CLOSED_PIPE); 
             }
             waiting = true;
             while (messages.isEmpty()) {
@@ -133,7 +136,7 @@ public class ReadingRunnable implements Runnable {
                             e);
                 }
                 if (messages.isEmpty() && !running) {
-                    throw new IOException("Closed pipe"); //$NON-NLS-1$
+                    throw new IOException(CLOSED_PIPE); 
                 }
             }
             LOGGER.finest("Polled: " + messages.peek()); //$NON-NLS-1$
@@ -161,19 +164,17 @@ public class ReadingRunnable implements Runnable {
     public boolean hasMessage() throws IOException {
         synchronized (lock) {
             if (!running) {
-                throw new IOException("Closed pipe"); //$NON-NLS-1$
+                throw new IOException(CLOSED_PIPE); 
             }
             return !messages.isEmpty();
         }
     }
 
-    /**
-     * 
-     */
+    /** Interrupts the wait on the next message by providing an empty message */
     public void interrupt() {
         synchronized (lock) {
             if (waiting) {
-                messages.offer("");
+                messages.offer(""); //$NON-NLS-1$
                 lock.notify();
             }
         }