Clean up exceptions

- Remove declared IOException
- Fix repetition of exception messages

scm-webapp/src/main/java/sonia/scm/user/DefaultUserManager.java

@@ -137,7 +137,7 @@ public class DefaultUserManager extends AbstractUserManager
    * @throws UserException
    */
   @Override
-  public void create(User user) throws UserException, IOException
+  public void create(User user) throws UserException
   {
     String type = user.getType();
 
@@ -155,7 +155,7 @@ public class DefaultUserManager extends AbstractUserManager
 
     if (userDAO.contains(user.getName()))
     {
-      throw new UserAlreadyExistsException(user.getName().concat(" user already exists"));
+      throw new UserAlreadyExistsException(user.getName());
     }
 
     AssertUtil.assertIsValid(user);
@@ -175,7 +175,7 @@ public class DefaultUserManager extends AbstractUserManager
    * @throws UserException
    */
   @Override
-  public void delete(User user) throws UserException, IOException
+  public void delete(User user) throws UserException
   {
     if (logger.isInfoEnabled())
     {
@@ -193,7 +193,7 @@ public class DefaultUserManager extends AbstractUserManager
     }
     else
     {
-      throw new UserNotFoundException("user does not exists");
+      throw new UserNotFoundException();
     }
   }
 
@@ -224,7 +224,7 @@ public class DefaultUserManager extends AbstractUserManager
    * @throws UserException
    */
   @Override
-  public void modify(User user) throws UserException, IOException
+  public void modify(User user) throws UserException
   {
     String name = user.getName();
     if (logger.isInfoEnabled())
@@ -245,7 +245,7 @@ public class DefaultUserManager extends AbstractUserManager
     }
     else
     {
-      throw new UserNotFoundException("user does not exists");
+      throw new UserNotFoundException();
     }
   }
 
@@ -259,7 +259,7 @@ public class DefaultUserManager extends AbstractUserManager
    * @throws UserException
    */
   @Override
-  public void refresh(User user) throws UserException, IOException
+  public void refresh(User user) throws UserException
   {
     if (logger.isInfoEnabled())
     {
@@ -271,7 +271,7 @@ public class DefaultUserManager extends AbstractUserManager
 
     if (fresh == null)
     {
-      throw new UserNotFoundException("user does not exists");
+      throw new UserNotFoundException();
     }
 
     fresh.copyProperties(user);