diff --git a/lib/app.php b/lib/app.php
index 86587c68..30339f53 100644
--- a/lib/app.php
+++ b/lib/app.php
@@ -56,7 +56,7 @@ class App {
 		'ldap' => 'OCA\Contacts\Backend\Ldap',
 		'local' => 'OCA\Contacts\Backend\Database',
 		'shared' => 'OCA\Contacts\Backend\Shared',
-                'owncloudusers' => 'OCA\Contacts\Backend\OwnCloudUsers',
+		'owncloudusers' => 'OCA\Contacts\Backend\OwnCloudUsers',
 	);
 
 	public function __construct(
diff --git a/lib/backend/owncloudusers.php b/lib/backend/owncloudusers.php
index e923ca0a..4918251f 100644
--- a/lib/backend/owncloudusers.php
+++ b/lib/backend/owncloudusers.php
@@ -6,7 +6,7 @@ use OCA\Contacts\Contact,
 	OCA\Contacts\VObject\VCard,
 	OCA\Contacts\Utils\Properties,
 	Sabre\VObject\Reader,
-        OCA\Contacts\Addressbook;
+	OCA\Contacts\Addressbook;
 
 
 /**
@@ -17,127 +17,127 @@ use OCA\Contacts\Contact,
 class OwnCloudUsers extends AbstractBackend {
 
     public $name = 'OwnCloudUsers';
-    
+
     /**
      * The table that holds the address books.
      * For every user there is *1* addressbook.
      * @var string
      */
     private $addressBooksTableName = '*PREFIX*contacts_ocu_addressbooks';
-    
+
     /**
      * The table that holds the contacts.
      * @var string
      */
     private $cardsTableName = '*PREFIX*contacts_ocu_cards';
-    
+
     public function __construct($userid){
-        $this->userid = $userid ? $userid : \OCP\User::getUser();
+	$this->userid = $userid ? $userid : \OCP\User::getUser();
     }
-    
+
     /**
      * {@inheritdoc}
      */
     public function getAddressBooksForUser(array $options = array()) {
-        // Only 1 addressbook for every user
-        $sql = 'SELECT * FROM ' . $this->addressBooksTableName . ' WHERE id = ?';
-        $args = array($this->userid);
-        $query = \OCP\DB::prepare($sql);
-        $result = $query->execute($args);
-        $row = $result->fetchRow();
+	// Only 1 addressbook for every user
+	$sql = 'SELECT * FROM ' . $this->addressBooksTableName . ' WHERE id = ?';
+	$args = array($this->userid);
+	$query = \OCP\DB::prepare($sql);
+	$result = $query->execute($args);
+	$row = $result->fetchRow();
 
-        if(!$row){ // TODO -> better way?
-            // Create new addressbook 
-            $sql = 'INSERT INTO ' . $this->addressBooksTableName 
-                    . ' ( '
-                        . 'id, '
-                        . 'displayname, '
-                        //. 'uri, ' TODO
-                        . 'description, '
-                        //. 'ctag, '
-                        . 'active '
-                    . ') VALUES ( '
-                        . '?, '
-                        . '?, '
-                        . '?, '
-                        . '? '
-                    . ')';
-            $args = array(
-                $this->userid,
-                'ownCloud Users',
-                'ownCloud Users',
-                1
-                );
-            $query = \OCP\DB::prepare($sql);
-            $query->execute($args);
-            
-            return $this->getAddressBooksForUser();
-        } else {
-            $row['permissions'] = \OCP\PERMISSION_ALL;
-            return array($row);
-        }
+	if(!$row){ // TODO -> better way?
+	    // Create new addressbook 
+	    $sql = 'INSERT INTO ' . $this->addressBooksTableName 
+		. ' ( '
+		    . 'id, '
+		    . 'displayname, '
+		    //. 'uri, ' TODO
+		    . 'description, '
+		    //. 'ctag, '
+		    . 'active '
+		. ') VALUES ( '
+		    . '?, '
+		    . '?, '
+		    . '?, '
+		    . '? '
+		. ')';
+	    $args = array(
+		$this->userid,
+		'ownCloud Users',
+		'ownCloud Users',
+		1
+	    );
+	    $query = \OCP\DB::prepare($sql);
+	    $query->execute($args);
+
+	    return $this->getAddressBooksForUser();
+	} else {
+	    $row['permissions'] = \OCP\PERMISSION_ALL;
+	    return array($row);
+	}
     }
-        
+
     /**
      * {@inheritdoc}
      * Only 1 addressbook for every user
      */
     public function getAddressBook($addressBookId, array $options = array()) {
-        
-        $sql = 'SELECT * FROM ' . $this->addressBooksTableName . ' WHERE id = ?';
-        $args = array($addressBookId);
-        $query = \OCP\DB::prepare($sql);
-        $result = $query->execute($args);
-        $row = $result->fetchRow();
-        $row['permissions'] = \OCP\PERMISSION_ALL;
-        $row['backend'] = $this->name;
 
-        return array($row);
+	$sql = 'SELECT * FROM ' . $this->addressBooksTableName . ' WHERE id = ?';
+	$args = array($addressBookId);
+	$query = \OCP\DB::prepare($sql);
+	$result = $query->execute($args);
+	$row = $result->fetchRow();
+	$row['permissions'] = \OCP\PERMISSION_ALL;
+	$row['backend'] = $this->name;
+
+	return array($row);
     }
-    
+
      /**
      * {@inheritdoc}
      * There are as many contacts in this addressbook as in this ownCloud installation
      */
     public function getContacts($addressbookid, array $options = array()){
-        $contacts =  array();
-        
-        $sql = 'SELECT * FROM ' . $this->cardsTableName . ' WHERE owner = ?';
-        $query = \OCP\DB::prepare($sql);
-        $result = $query->execute(array($this->userid));
-        while($row = $result->fetchRow()){
-            $row['permissions'] = \OCP\PERMISSION_ALL;
-            $contacts[] = $row;
-        }
-        
-        $contactsId = array();
-        
-        foreach($contacts as $contact){
-            $contactsId[] = $contact['id'];
-        }
-        
-        $users = \OCP\User::getUsers();
-        $recall = false;
-        
-        $add = array_diff($users, $contactsId);
-        $remove = array_diff($contactsId, $users);
-        if(count($add) > 0){
-            $this->addContacts($add, $addressbookid);
-            $recall = true;
-        }
-        
-        if(count($remove) > 0){
-            $this->removeContacts($remove, $addressbookid);
-            $recall = true;
-        }
-        
-        if($recall === true){
-            return $this->getContacts($addressbookid);
-        } else {
-            return $contacts;
-        }
+	$contacts =  array();
+
+	$sql = 'SELECT * FROM ' . $this->cardsTableName . ' WHERE owner = ?';
+	$query = \OCP\DB::prepare($sql);
+	$result = $query->execute(array($this->userid));
+	while($row = $result->fetchRow()){
+	    $row['permissions'] = \OCP\PERMISSION_ALL;
+	    $contacts[] = $row;
+	}
+
+	$contactsId = array();
+
+	foreach($contacts as $contact){
+	    $contactsId[] = $contact['id'];
+	}
+
+	$users = \OCP\User::getUsers();
+	$recall = false;
+
+	$add = array_diff($users, $contactsId);
+	$remove = array_diff($contactsId, $users);
+	if(count($add) > 0){
+	    $this->addContacts($add, $addressbookid);
+	    $recall = true;
+	}
+
+	if(count($remove) > 0){
+	    $this->removeContacts($remove, $addressbookid);
+	    $recall = true;
+	}
+
+	if($recall === true){
+	    return $this->getContacts($addressbookid);
+	} else {
+	    return $contacts;
+	}
     }
-    
+
      /**
      * {@inheritdoc}
      * If your username is "admin" and you want to retrieve your own contact
@@ -146,20 +146,20 @@ class OwnCloudUsers extends AbstractBackend {
       * ownCloud username 'bar' the params would be: $addressbookid = 'foo'; $id = 'bar';
      */
     public function getContact($addressbookid, $id, array $options = array()){
-        $sql = 'SELECT * FROM ' . $this->cardsTableName . ' WHERE owner = ?';
-        $query = \OCP\DB::prepare($sql);
-        $result = $query->execute(array($this->userid));
-        $row = $result->fetchRow();
-        $row['permissions'] = \OCP\PERMISSION_ALL;
-        
-        return $row;
+	$sql = 'SELECT * FROM ' . $this->cardsTableName . ' WHERE owner = ?';
+	$query = \OCP\DB::prepare($sql);
+	$result = $query->execute(array($this->userid));
+	$row = $result->fetchRow();
+	$row['permissions'] = \OCP\PERMISSION_ALL;
+
+	return $row;
     }
-    
+
     // Not needed since there is only one addressbook for every user
     public function createAddressBook(array $properties) {
-        
+
     }
-    
+
     /**
      * Help function to add contacts to an addressbook. 
      * This only happens when an admin creates new users
@@ -168,43 +168,43 @@ class OwnCloudUsers extends AbstractBackend {
      * @return bool
      */
     private function addContacts($contacts, $addressbookid){
-        foreach($contacts as $user){
-            $sql = 'INSERT INTO ' . $this->cardsTableName . ' ('
-                    . 'id, '
-                    . 'owner,'
-                    . 'addressbookid, '
-                    . 'fullname, '
-                    . 'carddata, '
-                    . 'uri, '
-                    . 'lastmodified'
-                    . ') VALUES ('
-                    . '?,'
-                    . '?,'
-                    . '?,'
-                    . '?,'
-                    . '?,'
-                    . '?,'
-                    . '?'
-                    . ')';
-            
-            $query = \OCP\DB::prepare($sql);
+	foreach($contacts as $user){
+	    $sql = 'INSERT INTO ' . $this->cardsTableName . ' ('
+		    . 'id, '
+		    . 'owner,'
+		    . 'addressbookid, '
+		    . 'fullname, '
+		    . 'carddata, '
+		    . 'uri, '
+		    . 'lastmodified'
+		. ') VALUES ('
+		    . '?,'
+		    . '?,'
+		    . '?,'
+		    . '?,'
+		    . '?,'
+		    . '?,'
+		    . '?'
+		. ')';
 
-            $contact = new Contact(	
-                $addressBook = new AddressBook($this , $this->getAddressBooksForUser()), // since there is only one addressbook with OC users for each OC user we can use this function
-                $this,
-                array(
-                    "id" => $user,
-                    "lastmodified" => time(), 
-                    "displayname" => \OCP\User::getDisplayName($user),
-                    "fullname" => \OCP\User::getDisplayName($user)
-                )
-            );
-            $carddata = $this->generateCardData($contact);
-            $result = $query->execute(array($user, $this->userid, $addressbookid, \OCP\User::getDisplayName($user), $carddata->serialize(), 'test', time()));
-            // TODO Check if $result succeeded
-        }
+	    $query = \OCP\DB::prepare($sql);
+
+	    $contact = new Contact(	
+		$addressBook = new AddressBook($this , $this->getAddressBooksForUser()), // since there is only one addressbook with OC users for each OC user we can use this function
+		$this,
+		array(
+		    "id" => $user,
+		    "lastmodified" => time(), 
+		    "displayname" => \OCP\User::getDisplayName($user),
+		    "fullname" => \OCP\User::getDisplayName($user)
+		)
+	    );
+	    $carddata = $this->generateCardData($contact);
+	    $result = $query->execute(array($user, $this->userid, $addressbookid, \OCP\User::getDisplayName($user), $carddata->serialize(), 'test', time()));
+	    // TODO Check if $result succeeded
+	}
     }
-    
+
     /**
      * Help function to remove contacts from an addressbook. 
      * This only happens when an admin remove an ownCloud user
@@ -213,104 +213,104 @@ class OwnCloudUsers extends AbstractBackend {
      * @return bool
      */
     private function removeContacts($contacts, $addressbookid){
-        foreach($contacts as $user){
-            $sql = 'DELETE FROM ' . $this->cardsTableName . ' WHERE owner = ? AND id = ?';
-            
-            $query = \OCP\DB::prepare($sql);
-            $result = $query->execute(array($this->userid, $user));
-            // TODO Check if $result succeeded
-        }
+	foreach($contacts as $user){
+	    $sql = 'DELETE FROM ' . $this->cardsTableName . ' WHERE owner = ? AND id = ?';
+
+	    $query = \OCP\DB::prepare($sql);
+	    $result = $query->execute(array($this->userid, $user));
+	    // TODO Check if $result succeeded
+	}
     }
-    
+
     /**
      * Help function to generate the carddate which than can be stored in the db 
      * @param string|VCard $data 
      * @return Vcard
      */
     private function generateCardData($data){
-        if (!$data instanceof VCard) {
-            try {
-                $data = Reader::read($data);
-            } catch(\Exception $e) {
-               \OCP\Util::writeLog('contacts', __METHOD__.', exception: '.$e->getMessage(), \OCP\Util::ERROR);
-                return false;
-            }      
-        }
+	if (!$data instanceof VCard) {
+	    try {
+		$data = Reader::read($data);
+	    } catch(\Exception $e) {
+	       \OCP\Util::writeLog('contacts', __METHOD__.', exception: '.$e->getMessage(), \OCP\Util::ERROR);
+		return false;
+	    }      
+	}
 
-        try {
-            $data->validate(VCard::REPAIR|VCard::UPGRADE);
-        } catch (\Exception $e) {
-            \OCP\Util::writeLog('contacts', __METHOD__ . ' ' .
-                'Error validating vcard: ' . $e->getMessage(), \OCP\Util::ERROR);
-            return false;
-        }
+	try {
+	    $data->validate(VCard::REPAIR|VCard::UPGRADE);
+	} catch (\Exception $e) {
+	    \OCP\Util::writeLog('contacts', __METHOD__ . ' ' .
+		'Error validating vcard: ' . $e->getMessage(), \OCP\Util::ERROR);
+	    return false;
+	}
 
-        $now = new \DateTime;
-        $data->REV = $now->format(\DateTime::W3C);
+	$now = new \DateTime;
+	$data->REV = $now->format(\DateTime::W3C);
 
-        $appinfo = \OCP\App::getAppInfo('contacts');
-        $appversion = \OCP\App::getAppVersion('contacts');
-        $prodid = '-//ownCloud//NONSGML ' . $appinfo['name'] . ' ' . $appversion.'//EN';
-        $data->PRODID = $prodid;
-        
-        return $data;
+	$appinfo = \OCP\App::getAppInfo('contacts');
+	$appversion = \OCP\App::getAppVersion('contacts');
+	$prodid = '-//ownCloud//NONSGML ' . $appinfo['name'] . ' ' . $appversion.'//EN';
+	$data->PRODID = $prodid;
+
+	return $data;
     }
-    
+
     /**
      * @inheritdoc
      */
     public function updateContact($addressBookId, $id, $contact, array $options = array()) {
 
-        $updateRevision = true;
-        $isCardDAV = false;
+	$updateRevision = true;
+	$isCardDAV = false;
 
-        if (!$contact instanceof VCard) {
-            try {
-                $contact = Reader::read($contact);
-            } catch(\Exception $e) {
-                \OCP\Util::writeLog('contacts', __METHOD__.', exception: '.$e->getMessage(), \OCP\Util::ERROR);
-                return false;
-            }
-        }
+	if (!$contact instanceof VCard) {
+	    try {
+		$contact = Reader::read($contact);
+	    } catch(\Exception $e) {
+		\OCP\Util::writeLog('contacts', __METHOD__.', exception: '.$e->getMessage(), \OCP\Util::ERROR);
+		return false;
+	    }
+	}
 
-        if (is_array($id)) {
-            if (isset($id['id'])) {
-                $id = $id['id'];
-            } elseif (isset($id['uri'])) {
-                $updateRevision = false;
-                $isCardDAV = true;
-                $id = $this->getIdFromUri($id['uri']);
+	if (is_array($id)) {
+	    if (isset($id['id'])) {
+		$id = $id['id'];
+	    } elseif (isset($id['uri'])) {
+		$updateRevision = false;
+		$isCardDAV = true;
+		$id = $this->getIdFromUri($id['uri']);
 
-                if (is_null($id)) {
-                    \OCP\Util::writeLog('contacts', __METHOD__ . ' Couldn\'t find contact', \OCP\Util::ERROR);
-                    return false;
-                }
+		if (is_null($id)) {
+		    \OCP\Util::writeLog('contacts', __METHOD__ . ' Couldn\'t find contact', \OCP\Util::ERROR);
+		    return false;
+		}
 
-            } else {
-                throw new \Exception(
-                    __METHOD__ . ' If second argument is an array, either \'id\' or \'uri\' has to be set.'
-                );
-            }
-        }
+	    } else {
+		throw new \Exception(
+		    __METHOD__ . ' If second argument is an array, either \'id\' or \'uri\' has to be set.'
+		);
+	    }
+	}
 
-        if ($updateRevision || !isset($contact->REV)) {
-            $now = new \DateTime;
-            $contact->REV = $now->format(\DateTime::W3C);
-        }
+	if ($updateRevision || !isset($contact->REV)) {
+	    $now = new \DateTime;
+	    $contact->REV = $now->format(\DateTime::W3C);
+	}
 
-        $data = $contact->serialize();
-        
-        $sql = 'UPDATE ' . $this->cardsTableName
-            . ' SET '
-                . '`addressbookid` = ?, '
-                . '`fullname` = ?, '
-                . '`carddata` = ?, '
-                . '`lastmodified` = ? '
-            . ' WHERE '
-                . '`id` = ? '
-                . 'AND `owner` = ? ';
-        $query = \OCP\DB::prepare($sql);
-        $result = $query->execute(array($addressBookId, $contact->FN, $data, time(), $id, $this->userid));
-        return true;
+	$data = $contact->serialize();
+
+	$sql = 'UPDATE ' . $this->cardsTableName
+	    . ' SET '
+		. '`addressbookid` = ?, '
+		. '`fullname` = ?, '
+		. '`carddata` = ?, '
+		. '`lastmodified` = ? '
+	    . ' WHERE '
+		. '`id` = ? '
+		. 'AND `owner` = ? ';
+	$query = \OCP\DB::prepare($sql);
+	$result = $query->execute(array($addressBookId, $contact->FN, $data, time(), $id, $this->userid));
+	return true;
     }
 }