Added comment and test

Signed-off-by: Emmanuel Bigeon <emmanuel@bigeon.fr>

gclc/src/main/java/net/bigeon/gclc/command/base/EchoCommand.java

@@ -43,10 +43,21 @@ import net.bigeon.gclc.exception.CommandRunException;
 import net.bigeon.gclc.manager.ConsoleInput;
 import net.bigeon.gclc.manager.ConsoleOutput;
 
-/** @author Emmanuel Bigeon */
+/** A command printing test to the console.
+ * <p>
+ * This command mimics the effect of the echo command in linux system. The
+ * difference is this command accepts java like formatting.
+ * 
+ * <pre>
+ * echo.execute(out, in, "My Formatted {0}, with {1}", "message", "short arguments");
+ * </pre>
+ * 
+ * @author Emmanuel Bigeon */
 public class EchoCommand extends Command {
 
-    /** @param name the command name */
+    /** Create the command.
+     * 
+     * @param name the command name */
     public EchoCommand(final String name) {
         super(name);
     }
@@ -56,8 +67,8 @@ public class EchoCommand extends Command {
      * fr.bigeon.gclc.command.ICommand#execute(fr.bigeon.gclc.manager.ConsoleOutput,
      * fr.bigeon.gclc.manager.ConsoleInput, java.lang.String[]) */
     @Override
-    public void execute(final ConsoleOutput out, final ConsoleInput in, final String... args)
-            throws CommandRunException {
+    public void execute(final ConsoleOutput out, final ConsoleInput in,
+            final String... args) throws CommandRunException {
         try {
             if (args.length == 1) {
                 out.print(args[0]);