diff --git a/YACOSWeb/src/org/yacos/auth/UserDetails.java b/YACOSWeb/src/org/yacos/auth/UserDetails.java
index f689f91..e572ee9 100644
--- a/YACOSWeb/src/org/yacos/auth/UserDetails.java
+++ b/YACOSWeb/src/org/yacos/auth/UserDetails.java
@@ -1,6 +1,7 @@
 package org.yacos.auth;
 
 import java.util.List;
+
 import org.acegisecurity.GrantedAuthority;
 import org.acegisecurity.GrantedAuthorityImpl;
 import org.yacos.core.users.Role;
diff --git a/YACOSWeb/src/org/yacos/web/PCmember/controller/ChoosePreferenceController.java b/YACOSWeb/src/org/yacos/web/PCmember/controller/ChoosePreferenceController.java
index dff940d..bcb3365 100644
--- a/YACOSWeb/src/org/yacos/web/PCmember/controller/ChoosePreferenceController.java
+++ b/YACOSWeb/src/org/yacos/web/PCmember/controller/ChoosePreferenceController.java
@@ -2,18 +2,23 @@ package org.yacos.web.PCmember.controller;
 
 
 
-import java.util.*;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
 
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
+
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.springframework.validation.BindException;
-
 import org.springframework.web.servlet.ModelAndView;
 import org.springframework.web.servlet.mvc.SimpleFormController;
 import org.springframework.web.servlet.view.RedirectView;
-import org.yacos.core.article.*;
+import org.yacos.core.article.Article;
+import org.yacos.core.article.IArticleManager;
+import org.yacos.core.article.Preference;
 import org.yacos.core.conferences.IConferenceManager;
 import org.yacos.core.users.IUserManager;
 import org.yacos.core.users.User;
diff --git a/YACOSWeb/src/org/yacos/web/PCmember/controller/ChoosePreferenceControllerOK.java b/YACOSWeb/src/org/yacos/web/PCmember/controller/ChoosePreferenceControllerOK.java
index c825363..a45b4a6 100644
--- a/YACOSWeb/src/org/yacos/web/PCmember/controller/ChoosePreferenceControllerOK.java
+++ b/YACOSWeb/src/org/yacos/web/PCmember/controller/ChoosePreferenceControllerOK.java
@@ -1,14 +1,15 @@
 package org.yacos.web.PCmember.controller;
 
-import org.springframework.web.servlet.mvc.SimpleFormController;
-import org.springframework.web.servlet.ModelAndView;
+import java.io.IOException;
 
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
+
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
-import java.io.IOException;
+import org.springframework.web.servlet.ModelAndView;
+import org.springframework.web.servlet.mvc.SimpleFormController;
 
 public class ChoosePreferenceControllerOK extends SimpleFormController {
 
diff --git a/YACOSWeb/src/org/yacos/web/PCmember/controller/CreateReportController.java b/YACOSWeb/src/org/yacos/web/PCmember/controller/CreateReportController.java
index 1e9f921..007fd5c 100644
--- a/YACOSWeb/src/org/yacos/web/PCmember/controller/CreateReportController.java
+++ b/YACOSWeb/src/org/yacos/web/PCmember/controller/CreateReportController.java
@@ -1,6 +1,7 @@
 package org.yacos.web.PCmember.controller;
 
 import java.io.IOException;
+
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
diff --git a/YACOSWeb/src/org/yacos/web/PCmember/controller/DispatchArticleController.java b/YACOSWeb/src/org/yacos/web/PCmember/controller/DispatchArticleController.java
index 8082c59..9acd288 100644
--- a/YACOSWeb/src/org/yacos/web/PCmember/controller/DispatchArticleController.java
+++ b/YACOSWeb/src/org/yacos/web/PCmember/controller/DispatchArticleController.java
@@ -2,8 +2,10 @@ package org.yacos.web.PCmember.controller;
 
 import java.util.ArrayList;
 import java.util.Collection;
+
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
+
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.springframework.validation.BindException;
diff --git a/YACOSWeb/src/org/yacos/web/PCmember/controller/EvaluationController.java b/YACOSWeb/src/org/yacos/web/PCmember/controller/EvaluationController.java
index caed138..752b9c4 100644
--- a/YACOSWeb/src/org/yacos/web/PCmember/controller/EvaluationController.java
+++ b/YACOSWeb/src/org/yacos/web/PCmember/controller/EvaluationController.java
@@ -2,16 +2,20 @@ package org.yacos.web.PCmember.controller;
 
 
 
-import java.util.*;
+import java.util.ArrayList;
+import java.util.List;
+
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
+
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.springframework.validation.BindException;
 import org.springframework.web.servlet.ModelAndView;
 import org.springframework.web.servlet.mvc.SimpleFormController;
 import org.springframework.web.servlet.view.RedirectView;
-import org.yacos.core.article.*;
+import org.yacos.core.article.Article;
+import org.yacos.core.article.IArticleManager;
 import org.yacos.core.conferences.Conference;
 import org.yacos.core.conferences.IConferenceManager;
 import org.yacos.core.evaluation.Criterion;
@@ -20,10 +24,7 @@ import org.yacos.core.evaluation.Rating;
 import org.yacos.core.evaluation.Report;
 import org.yacos.core.users.IUserManager;
 import org.yacos.core.users.User;
-
-//import org.yacos.web.author.form.*;
 import org.yacos.web.PCmember.form.FormEvaluation;
-
 import org.yacos.web.PCmember.form.SimpleCriterion;
 import org.yacos.web.system.session.SessionService;
 
diff --git a/YACOSWeb/src/org/yacos/web/PCmember/controller/ListArticleController.java b/YACOSWeb/src/org/yacos/web/PCmember/controller/ListArticleController.java
index a3ba86f..b44c853 100644
--- a/YACOSWeb/src/org/yacos/web/PCmember/controller/ListArticleController.java
+++ b/YACOSWeb/src/org/yacos/web/PCmember/controller/ListArticleController.java
@@ -1,20 +1,21 @@
 package org.yacos.web.PCmember.controller;
 
-import org.springframework.web.servlet.mvc.SimpleFormController;
-import org.springframework.web.servlet.ModelAndView;
+import java.io.IOException;
+import java.util.List;
 
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
+
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
-import java.io.IOException;
-import java.util.List;
-import org.yacos.web.system.controller.NoConferenceSelectedException;
-import org.yacos.web.system.session.SessionService;
+import org.springframework.web.servlet.ModelAndView;
+import org.springframework.web.servlet.mvc.SimpleFormController;
 import org.yacos.core.article.Article;
 import org.yacos.core.article.IArticleManager;
 import org.yacos.core.exceptions.ConferenceDoesntExistException;
+import org.yacos.web.system.controller.NoConferenceSelectedException;
+import org.yacos.web.system.session.SessionService;
 
 public class ListArticleController extends SimpleFormController {
 
diff --git a/YACOSWeb/src/org/yacos/web/PCmember/controller/ListEvaluationController.java b/YACOSWeb/src/org/yacos/web/PCmember/controller/ListEvaluationController.java
index feb7aa7..6cca709 100644
--- a/YACOSWeb/src/org/yacos/web/PCmember/controller/ListEvaluationController.java
+++ b/YACOSWeb/src/org/yacos/web/PCmember/controller/ListEvaluationController.java
@@ -1,20 +1,21 @@
 package org.yacos.web.PCmember.controller;
 
-import org.springframework.web.servlet.mvc.SimpleFormController;
-import org.springframework.web.servlet.ModelAndView;
+import java.io.IOException;
+import java.util.List;
 
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
+
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
-import java.io.IOException;
-import java.util.List;
-import org.yacos.web.system.controller.NoConferenceSelectedException;
-import org.yacos.web.system.session.SessionService;
+import org.springframework.web.servlet.ModelAndView;
+import org.springframework.web.servlet.mvc.SimpleFormController;
 import org.yacos.core.article.Article;
 import org.yacos.core.article.IArticleManager;
 import org.yacos.core.exceptions.ConferenceDoesntExistException;
+import org.yacos.web.system.controller.NoConferenceSelectedException;
+import org.yacos.web.system.session.SessionService;
 
 public class ListEvaluationController extends SimpleFormController {
 
diff --git a/YACOSWeb/src/org/yacos/web/PCmember/controller/ListReportController.java b/YACOSWeb/src/org/yacos/web/PCmember/controller/ListReportController.java
index f8e599e..4919627 100644
--- a/YACOSWeb/src/org/yacos/web/PCmember/controller/ListReportController.java
+++ b/YACOSWeb/src/org/yacos/web/PCmember/controller/ListReportController.java
@@ -1,18 +1,20 @@
 package org.yacos.web.PCmember.controller;
 
-import org.springframework.web.servlet.mvc.SimpleFormController;
-import org.springframework.web.servlet.ModelAndView;
+import java.io.IOException;
+import java.util.List;
+
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
+
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
-import java.io.IOException;
-import java.util.List;
-import org.yacos.web.system.controller.NoConferenceSelectedException;
+import org.springframework.web.servlet.ModelAndView;
+import org.springframework.web.servlet.mvc.SimpleFormController;
 import org.yacos.core.evaluation.IEvaluationManager;
 import org.yacos.core.evaluation.Rating;
 import org.yacos.core.evaluation.Report;
+import org.yacos.web.system.controller.NoConferenceSelectedException;
 
 
 public class ListReportController extends SimpleFormController {
diff --git a/YACOSWeb/src/org/yacos/web/PCmember/controller/ValidateArticleController.java b/YACOSWeb/src/org/yacos/web/PCmember/controller/ValidateArticleController.java
index c19913c..6178298 100644
--- a/YACOSWeb/src/org/yacos/web/PCmember/controller/ValidateArticleController.java
+++ b/YACOSWeb/src/org/yacos/web/PCmember/controller/ValidateArticleController.java
@@ -1,17 +1,19 @@
 package org.yacos.web.PCmember.controller;
-import org.springframework.web.servlet.mvc.SimpleFormController;
-import org.springframework.web.servlet.ModelAndView;
+import java.io.IOException;
+import java.util.List;
+
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
+
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
-import java.io.IOException;
-import java.util.List;
-import org.yacos.web.system.session.SessionService;
+import org.springframework.web.servlet.ModelAndView;
+import org.springframework.web.servlet.mvc.SimpleFormController;
 import org.yacos.core.article.Article;
 import org.yacos.core.article.IArticleManager;
 import org.yacos.core.exceptions.ConferenceDoesntExistException;
+import org.yacos.web.system.session.SessionService;
 
 
 public class ValidateArticleController extends SimpleFormController {
diff --git a/YACOSWeb/src/org/yacos/web/PCmember/controller/ValideOrRejectController.java b/YACOSWeb/src/org/yacos/web/PCmember/controller/ValideOrRejectController.java
index e5f2c0e..414026c 100644
--- a/YACOSWeb/src/org/yacos/web/PCmember/controller/ValideOrRejectController.java
+++ b/YACOSWeb/src/org/yacos/web/PCmember/controller/ValideOrRejectController.java
@@ -1,23 +1,19 @@
 package org.yacos.web.PCmember.controller;
 
-import org.springframework.web.servlet.mvc.SimpleFormController;
-import org.springframework.web.servlet.view.RedirectView;
-import org.springframework.web.servlet.ModelAndView;
+import java.lang.reflect.UndeclaredThrowableException;
 
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
+
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
-import java.io.IOException;
-import java.lang.reflect.UndeclaredThrowableException;
-import java.util.List;
-import org.yacos.web.system.controller.NoConferenceSelectedException;
-import org.yacos.web.system.session.SessionService;
+import org.springframework.web.servlet.ModelAndView;
+import org.springframework.web.servlet.mvc.SimpleFormController;
+import org.springframework.web.servlet.view.RedirectView;
 import org.yacos.core.article.Article;
 import org.yacos.core.article.IArticleManager;
 import org.yacos.core.article.Article.State;
-import org.yacos.core.exceptions.ConferenceDoesntExistException;
 
 public class ValideOrRejectController extends SimpleFormController {
 
diff --git a/YACOSWeb/src/org/yacos/web/author/controller/MainController.java b/YACOSWeb/src/org/yacos/web/author/controller/MainController.java
index 08a2154..627b745 100644
--- a/YACOSWeb/src/org/yacos/web/author/controller/MainController.java
+++ b/YACOSWeb/src/org/yacos/web/author/controller/MainController.java
@@ -1,13 +1,15 @@
 package org.yacos.web.author.controller;
 
-import org.springframework.web.servlet.mvc.SimpleFormController;
-import org.springframework.web.servlet.ModelAndView;
+import java.io.IOException;
+
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
+
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
-import java.io.IOException;
+import org.springframework.web.servlet.ModelAndView;
+import org.springframework.web.servlet.mvc.SimpleFormController;
 
 public class MainController extends SimpleFormController {
 
diff --git a/YACOSWeb/src/org/yacos/web/author/controller/ManageArticleController.java b/YACOSWeb/src/org/yacos/web/author/controller/ManageArticleController.java
index a132779..c2bf6f2 100644
--- a/YACOSWeb/src/org/yacos/web/author/controller/ManageArticleController.java
+++ b/YACOSWeb/src/org/yacos/web/author/controller/ManageArticleController.java
@@ -1,20 +1,22 @@
 package org.yacos.web.author.controller;
 
-import org.springframework.web.servlet.mvc.SimpleFormController;
-import org.springframework.web.servlet.ModelAndView;
-import javax.servlet.ServletException;
-import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.springframework.web.servlet.ModelAndView;
+import org.springframework.web.servlet.mvc.SimpleFormController;
+import org.yacos.core.article.Article;
+import org.yacos.core.article.IArticleManager;
 import org.yacos.web.author.form.ArticleBean;
 import org.yacos.web.system.controller.NoConferenceSelectedException;
 import org.yacos.web.system.session.SessionService;
-import org.yacos.core.article.Article;
-import org.yacos.core.article.IArticleManager;
 
 public class ManageArticleController extends SimpleFormController {
 
diff --git a/YACOSWeb/src/org/yacos/web/author/controller/SArticleController.java b/YACOSWeb/src/org/yacos/web/author/controller/SArticleController.java
index 28d67ab..e341ada 100644
--- a/YACOSWeb/src/org/yacos/web/author/controller/SArticleController.java
+++ b/YACOSWeb/src/org/yacos/web/author/controller/SArticleController.java
@@ -5,9 +5,11 @@ import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.util.ArrayList;
+
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
+
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.springframework.validation.BindException;
diff --git a/YACOSWeb/src/org/yacos/web/author/controller/SArticleControllerOK.java b/YACOSWeb/src/org/yacos/web/author/controller/SArticleControllerOK.java
index 4f6a5e3..4e06376 100644
--- a/YACOSWeb/src/org/yacos/web/author/controller/SArticleControllerOK.java
+++ b/YACOSWeb/src/org/yacos/web/author/controller/SArticleControllerOK.java
@@ -1,13 +1,15 @@
 package org.yacos.web.author.controller;
 
-import org.springframework.web.servlet.mvc.SimpleFormController;
-import org.springframework.web.servlet.ModelAndView;
+import java.io.IOException;
+
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
+
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
-import java.io.IOException;
+import org.springframework.web.servlet.ModelAndView;
+import org.springframework.web.servlet.mvc.SimpleFormController;
 
 public class SArticleControllerOK extends SimpleFormController {
 
diff --git a/YACOSWeb/src/org/yacos/web/author/validator/ValidateSubmission.java b/YACOSWeb/src/org/yacos/web/author/validator/ValidateSubmission.java
index 239c275..bc70832 100644
--- a/YACOSWeb/src/org/yacos/web/author/validator/ValidateSubmission.java
+++ b/YACOSWeb/src/org/yacos/web/author/validator/ValidateSubmission.java
@@ -7,55 +7,37 @@ import org.yacos.web.author.form.FormSubmission;
 
 public class ValidateSubmission implements Validator {
 
+	@SuppressWarnings("unchecked")
 	public boolean supports(Class arg0) {
 		return FormSubmission.class.isAssignableFrom(arg0);
 	}
 
 	public void validate(Object arg0, Errors arg1) {
-	   
-		  FormSubmission sub=(FormSubmission)arg0;
-		  
-		  String title=sub.getTitle();
-		  String theme=sub.getTheme();
-		  String abs=sub.getAbstractText();
-		  String mainauthor=sub.getMainauthor();
-		  String file=sub.getFile().getName();
-		  
-		  if (title== null || title.trim().length() == 0) {
-			arg1.rejectValue("title",
-			"submissionArticle.title",
-			"Le title est n��cessaire !");
-			}
-		  
-		 
-		  if (theme==null|theme.trim().length()==0)
-			  
-		  {
-	     arg1.rejectValue("theme", "submissionArticle.theme");
-	     }
-		  
-		  
-		  if (abs==null|abs.trim().length()==0)
-			  
-		  { arg1.rejectValue("abstractText", "submissionArticle.abstractText", "text is not nullable");
-		  
-		   }
-		  
-		 
-		  /*if (mainauthor==null|mainauthor.trim().length()==0)
-			  
-		  {
-	     arg1.rejectValue("mainauthor", "submissionArticle.mainauthor");
-	     }*/
-		  
-		  
-		/*  if (file==null|file.trim().length()==0)
-			  
-		  {
-	     arg1.rejectValue("file", "submissionArticle.file");
-	     }
-		  
-*/
-	}
 
+		FormSubmission sub=(FormSubmission)arg0;
+
+		String title=sub.getTitle();
+		String theme=sub.getTheme();
+		String abs=sub.getAbstractText();
+
+		if (title== null || title.trim().length() == 0) {
+			arg1.rejectValue("title",
+					"submissionArticle.title",
+			"Le title est n��cessaire !");
+		}
+
+
+		if (theme==null|theme.trim().length()==0)
+
+		{
+			arg1.rejectValue("theme", "submissionArticle.theme");
+		}
+
+
+		if (abs==null|abs.trim().length()==0)
+
+		{ arg1.rejectValue("abstractText", "submissionArticle.abstractText", "text is not nullable");
+
+		}
+	}
 }
diff --git a/YACOSWeb/src/org/yacos/web/chairman/controller/AddConferenceController.java b/YACOSWeb/src/org/yacos/web/chairman/controller/AddConferenceController.java
index 4e3d9c7..f93fe7b 100644
--- a/YACOSWeb/src/org/yacos/web/chairman/controller/AddConferenceController.java
+++ b/YACOSWeb/src/org/yacos/web/chairman/controller/AddConferenceController.java
@@ -8,8 +8,10 @@ import java.util.List;
 import java.util.Set;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
+
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
+
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.springframework.mail.MailSendException;
@@ -246,8 +248,8 @@ public class AddConferenceController extends AbstractWizardFormController {
 		String action = request.getParameter("action");
 		if (action == null || action.equals(""))
 		{
-			// TODO : tester ici si le gars a le droit d'être ici
-			// a-t-il le droit de créer une conférence ?
+			// TODO : tester ici si le gars a le droit d'�tre ici
+			// a-t-il le droit de cr�er une conf�rence ?
 			
 			criteria = new HashSet<CriterionBean>();
 			criteriaAll = new HashSet<CriterionBean>();
diff --git a/YACOSWeb/src/org/yacos/web/chairman/controller/PCMemberBean.java b/YACOSWeb/src/org/yacos/web/chairman/controller/PCMemberBean.java
index b177710..ca365cc 100644
--- a/YACOSWeb/src/org/yacos/web/chairman/controller/PCMemberBean.java
+++ b/YACOSWeb/src/org/yacos/web/chairman/controller/PCMemberBean.java
@@ -1,6 +1,5 @@
 package org.yacos.web.chairman.controller;
 
-import org.yacos.core.article.Preference.PreferenceType;
 
 public class PCMemberBean {
 	private String login;
diff --git a/YACOSWeb/src/org/yacos/web/chairman/validation/ConferenceValidator.java b/YACOSWeb/src/org/yacos/web/chairman/validation/ConferenceValidator.java
index 2fee062..ff07e14 100644
--- a/YACOSWeb/src/org/yacos/web/chairman/validation/ConferenceValidator.java
+++ b/YACOSWeb/src/org/yacos/web/chairman/validation/ConferenceValidator.java
@@ -12,6 +12,7 @@ import org.yacos.web.chairman.form.FormConference;
 
 public class ConferenceValidator implements Validator {
 
+	@SuppressWarnings("unchecked")
 	public boolean supports(Class commandClass) {
 		return FormConference.class.isAssignableFrom(commandClass);
 	}
diff --git a/YACOSWeb/src/org/yacos/web/system/controller/ArticleDownloadController.java b/YACOSWeb/src/org/yacos/web/system/controller/ArticleDownloadController.java
index 9c398b4..3cb7f93 100644
--- a/YACOSWeb/src/org/yacos/web/system/controller/ArticleDownloadController.java
+++ b/YACOSWeb/src/org/yacos/web/system/controller/ArticleDownloadController.java
@@ -4,9 +4,11 @@ import java.io.BufferedInputStream;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.InputStream;
+
 import javax.servlet.ServletContext;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
+
 import org.springframework.util.FileCopyUtils;
 import org.springframework.web.servlet.ModelAndView;
 import org.springframework.web.servlet.mvc.Controller;
diff --git a/YACOSWeb/src/org/yacos/web/system/controller/ChooseConferenceController.java b/YACOSWeb/src/org/yacos/web/system/controller/ChooseConferenceController.java
index ef5d712..551e765 100644
--- a/YACOSWeb/src/org/yacos/web/system/controller/ChooseConferenceController.java
+++ b/YACOSWeb/src/org/yacos/web/system/controller/ChooseConferenceController.java
@@ -5,6 +5,7 @@ import java.util.Map;
 
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
+
 import org.springframework.web.servlet.ModelAndView;
 import org.springframework.web.servlet.mvc.Controller;
 import org.springframework.web.servlet.view.RedirectView;
diff --git a/YACOSWeb/src/org/yacos/web/system/controller/SUserRegistrationController.java b/YACOSWeb/src/org/yacos/web/system/controller/SUserRegistrationController.java
index b0493d1..7bfc166 100644
--- a/YACOSWeb/src/org/yacos/web/system/controller/SUserRegistrationController.java
+++ b/YACOSWeb/src/org/yacos/web/system/controller/SUserRegistrationController.java
@@ -6,7 +6,6 @@ package org.yacos.web.system.controller;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
-import org.acegisecurity.providers.dao.UserCache;
 import org.springframework.validation.BindException;
 import org.springframework.web.servlet.ModelAndView;
 import org.springframework.web.servlet.mvc.SimpleFormController;
diff --git a/YACOSWeb/src/org/yacos/web/system/session/SessionService.java b/YACOSWeb/src/org/yacos/web/system/session/SessionService.java
index 4f240aa..2554917 100644
--- a/YACOSWeb/src/org/yacos/web/system/session/SessionService.java
+++ b/YACOSWeb/src/org/yacos/web/system/session/SessionService.java
@@ -1,12 +1,11 @@
 package org.yacos.web.system.session;
 
-import java.util.List;
-
 import javax.naming.Context;
 import javax.naming.InitialContext;
 import javax.naming.NamingException;
 import javax.servlet.ServletContext;
 import javax.servlet.http.HttpServletRequest;
+
 import org.acegisecurity.Authentication;
 import org.acegisecurity.context.SecurityContextHolder;
 import org.acegisecurity.providers.UsernamePasswordAuthenticationToken;
@@ -18,7 +17,6 @@ import org.yacos.core.conferences.Conference;
 import org.yacos.core.conferences.IConferenceManager;
 import org.yacos.core.users.IUserManager;
 import org.yacos.core.users.User;
-import org.yacos.core.users.Role;
 
 /**
  * Provides Session related Services