diff --git a/application/core/APIv1_Controller.php b/application/core/APIv1_Controller.php
index 6432c87db..b0c98c6e5 100644
--- a/application/core/APIv1_Controller.php
+++ b/application/core/APIv1_Controller.php
@@ -1,9 +1,11 @@
 <?php
 
+if (!defined('BASEPATH')) exit('No direct script access allowed');
+
 /**
  * REST_Controller takes care about authentication and it loads the AuthLib
  */
-class APIv1_Controller extends REST_Controller
+abstract class APIv1_Controller extends REST_Controller
 {
 	private $_requiredPermissions;
 
diff --git a/application/core/Auth_Controller.php b/application/core/Auth_Controller.php
index 5d03091f0..c407a106f 100644
--- a/application/core/Auth_Controller.php
+++ b/application/core/Auth_Controller.php
@@ -1,8 +1,11 @@
 <?php
 
-if (! defined('BASEPATH')) exit('No direct script access allowed');
+if (!defined('BASEPATH')) exit('No direct script access allowed');
 
-class Auth_Controller extends FHC_Controller
+/**
+ *
+ */
+abstract class Auth_Controller extends FHC_Controller
 {
 	/**
 	 * Extends this controller if authentication is required
diff --git a/application/core/CLI_Controller.php b/application/core/CLI_Controller.php
index 61e3eb4c9..79e2a1283 100644
--- a/application/core/CLI_Controller.php
+++ b/application/core/CLI_Controller.php
@@ -2,7 +2,10 @@
 
 if (!defined('BASEPATH')) exit('No direct script access allowed');
 
-class CLI_Controller extends FHC_Controller
+/**
+ *
+ */
+abstract class CLI_Controller extends FHC_Controller
 {
 	const INFO_FORMAT = '%s %s %s %s'; // Info message format
 	const REQUIRED_PARAM_FORMAT = ' %s'; // Info message required method parameter format
diff --git a/application/core/DB_Model.php b/application/core/DB_Model.php
index b1e88e164..ca760c662 100644
--- a/application/core/DB_Model.php
+++ b/application/core/DB_Model.php
@@ -1,5 +1,10 @@
 <?php
 
+if (!defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ *
+ */
 class DB_Model extends CI_Model
 {
 	// Default schema used by the models
diff --git a/application/core/FHC_Controller.php b/application/core/FHC_Controller.php
index db02be3c4..234cf6a6f 100644
--- a/application/core/FHC_Controller.php
+++ b/application/core/FHC_Controller.php
@@ -1,8 +1,11 @@
 <?php
 
-if (! defined('BASEPATH')) exit('No direct script access allowed');
+if (!defined('BASEPATH')) exit('No direct script access allowed');
 
-class FHC_Controller extends CI_Controller
+/**
+ *
+ */
+abstract class FHC_Controller extends CI_Controller
 {
 	const FHC_CONTROLLER_ID = 'fhc_controller_id'; // name of the parameter used to identify uniquely a call to a controller
 
diff --git a/application/core/FS_Model.php b/application/core/FS_Model.php
index 4081bf8f4..03a0ee095 100644
--- a/application/core/FS_Model.php
+++ b/application/core/FS_Model.php
@@ -1,6 +1,11 @@
 <?php
 
-class FS_Model extends CI_Model
+if (!defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ *
+ */
+abstract class FS_Model extends CI_Model
 {
 	protected $filepath;  // Path of the file
 
diff --git a/application/core/JOB_Controller.php b/application/core/JOB_Controller.php
new file mode 100644
index 000000000..ea779b169
--- /dev/null
+++ b/application/core/JOB_Controller.php
@@ -0,0 +1,92 @@
+<?php
+
+if (!defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ *
+ */
+abstract class JOB_Controller extends CLI_Controller
+{
+	/**
+	 * Constructor
+	 */
+    public function __construct()
+	{
+        parent::__construct();
+
+		// Loads LogLib with different debug trace levels to get data of the job that extends this class
+		// It also specify parameters to set database fields
+		$this->load->library('LogLib', array(
+			'classIndex' => 5,
+			'functionIndex' => 5,
+			'lineIndex' => 4,
+			'dbLogType' => 'job', // required
+			'dbExecuteUser' => 'Cronjob system'
+		));
+	}
+
+	//------------------------------------------------------------------------------------------------------------------
+	// Protected methods
+
+	/**
+	 * Writes a cronjob info log
+	 */
+	protected function logInfo($response, $parameters = null)
+	{
+		$this->_log(LogLib::INFO, 'Cronjob info', $response, $parameters);
+	}
+
+	/**
+	 * Writes a cronjob debug log
+	 */
+	protected function logDebug($response, $parameters = null)
+	{
+		$this->_log(LogLib::DEBUG, 'Cronjob debug', $response, $parameters);
+	}
+
+	/**
+	 * Writes a cronjob warning log
+	 */
+	protected function logWarning($response, $parameters = null)
+	{
+		$this->_log(LogLib::WARNING, 'Cronjob warning', $response, $parameters);
+	}
+
+	/**
+	 * Writes a cronjob error log
+	 */
+	protected function logError($response, $parameters = null)
+	{
+		$this->_log(LogLib::ERROR, 'Cronjob error', $response, $parameters);
+	}
+
+	//------------------------------------------------------------------------------------------------------------------
+	// Private methods
+
+	/**
+	 * Writes a log to database
+	 */
+	private function _log($level, $requestId, $response, $parameters)
+	{
+		$data = new stdClass();
+
+		$data->response = $response;
+		if ($parameters != null) $data->parameters = $parameters;
+
+		switch($level)
+		{
+			case LogLib::INFO:
+				$this->loglib->logInfoDB($requestId, json_encode(success($data, LogLib::INFO)));
+				break;
+			case LogLib::DEBUG:
+				$this->loglib->logDebugDB($requestId, json_encode(success($data, LogLib::DEBUG)));
+				break;
+			case LogLib::WARNING:
+				$this->loglib->logWarningDB($requestId, json_encode(error($data, LogLib::WARNING)));
+				break;
+			case LogLib::ERROR:
+				$this->loglib->logErrorDB($requestId, json_encode(error($data, LogLib::ERROR)));
+				break;
+		}
+	}
+}
diff --git a/application/libraries/LogLib.php b/application/libraries/LogLib.php
index cb0541003..b98575150 100644
--- a/application/libraries/LogLib.php
+++ b/application/libraries/LogLib.php
@@ -1,102 +1,252 @@
 <?php
 
-if (! defined('BASEPATH')) exit('No direct script access allowed');
+if (!defined('BASEPATH')) exit('No direct script access allowed');
 
 /**
  * Library usefull for logging!
+ * This library can log using CodeIgniter log system (file system) or to database
  */
 class LogLib
 {
-	const DEBUG = 'debug';
-	const ERROR = 'error';
+	// Log levels
 	const INFO = 'info';
+	const DEBUG = 'debug';
+	const WARNING = 'warning';
+	const ERROR = 'error';
 
+	// Default debug trace levels
+	const CLASS_INDEX = 3;
+	const FUNCTION_INDEX = 3;
+	const LINE_INDEX = 2;
+
+	const DB_EXECUTE_USER = 'LogLib'; // Default execute user
+
+	// Caller data names
+	const CLASS_NAME = 'className';
+	const FUNCTION_NAME = 'functionName';
+	const CODE_LINE = 'codeLine';
+
+	// To format the log message prefix when logging to file system
 	const CALLER_PREFIX = '[';
 	const CALLER_POSTFIX = ']';
 	const CLASS_POSTFIX = '->';
 	const LINE_SEPARATOR = ':';
 
-	// --------------------------------------------------------------------------------------------------------------
-	// Public methods
+	// CodeIgniter configuration log entry name and log debug value
+	const CI_LOG_THRESHOLD_NAME = 'log_threshold';
+	const CI_LOG_THRESHOLD_DEBUG = 2;
+
+	// LogLib parameters names
+	const P_NAME_CLASS_INDEX = 'classIndex';
+	const P_NAME_FUNCTION_INDEX = 'functionIndex';
+	const P_NAME_LINE_INDEX = 'lineIndex';
+	const P_NAME_DB_LOG_TYPE = 'dbLogType';
+	const P_NAME_DB_EXECUTE_USER = 'dbExecuteUser';
+
+	// Properties used to retrieve caller data
+	private $_classIndex;
+	private $_functionIndex;
+	private $_lineIndex;
+
+	// Properties used when logging to database
+	private $_dbLogType;
+	private $_dbExecuteUser;
 
 	/**
-	 * logDebug
+	 * Set properties to a default value or overwrites them with the given parameters
+	 */
+	public function __construct($params = null)
+	{
+		// Properties default values
+		$this->_classIndex = self::CLASS_INDEX;
+		$this->_functionIndex = self::FUNCTION_INDEX;
+		$this->_lineIndex = self::LINE_INDEX;
+		$this->_dbLogType = null;
+		$this->_dbExecuteUser = self::DB_EXECUTE_USER;
+
+		// If parameters are given then overwrite the default values
+		if (!isEmptyArray($params))
+		{
+			if (isset($params[self::P_NAME_CLASS_INDEX])) $this->_classIndex = $params[self::P_NAME_CLASS_INDEX];
+			if (isset($params[self::P_NAME_FUNCTION_INDEX])) $this->_functionIndex = $params[self::P_NAME_FUNCTION_INDEX];
+			if (isset($params[self::P_NAME_LINE_INDEX])) $this->_lineIndex = $params[self::P_NAME_LINE_INDEX];
+			if (isset($params[self::P_NAME_DB_LOG_TYPE])) $this->_dbLogType = $params[self::P_NAME_DB_LOG_TYPE];
+			if (isset($params[self::P_NAME_DB_EXECUTE_USER])) $this->_dbExecuteUser = $params[self::P_NAME_DB_EXECUTE_USER];
+		}
+	}
+
+	// --------------------------------------------------------------------------------------------------------------
+	// Public methods based on CodeIgniter log system
+
+	/**
+	 * Writes a debug log to CodeIgniter log
 	 */
 	public function logDebug($message)
 	{
-		$this->_log(LogLib::DEBUG, $message);
+		$this->_log(self::DEBUG, $message);
 	}
 
 	/**
-	 * logInfo
+	 * Writes an info log to CodeIgniter log
 	 */
 	public function logInfo($message)
 	{
-		$this->_log(LogLib::INFO, $message);
+		$this->_log(self::INFO, $message);
 	}
 
 	/**
-	 * logError
+	 * Writes an error log to CodeIgniter log
 	 */
 	public function logError($message)
 	{
-		$this->_log(LogLib::ERROR, $message);
+		$this->_log(self::ERROR, $message);
+	}
+
+	// --------------------------------------------------------------------------------------------------------------
+	// Public methods based on database
+
+	/**
+	 * Writes an info log to database
+	 */
+	public function logInfoDB($requestId, $data)
+	{
+		$this->_logDB(self::INFO, $requestId, $data);
+	}
+
+	/**
+	 * Writes a debug log to database
+	 */
+	public function logDebugDB($requestId, $data)
+	{
+		$this->_logDB(self::DEBUG, $requestId, $data);
+	}
+
+	/**
+	 * Writes an warning log to database
+	 */
+	public function logWarningDB($requestId, $data)
+	{
+		$this->_logDB(self::WARNING, $requestId, $data);
+	}
+
+	/**
+	 * Writes an error log to database
+	 */
+	public function logErrorDB($requestId, $data)
+	{
+		$this->_logDB(self::ERROR, $requestId, $data);
 	}
 
 	// --------------------------------------------------------------------------------------------------------------
 	// Private methods
 
 	/**
-	 * log
+	 * Writes using CodeIgniter log system (file system)
 	 */
 	private function _log($level, $message)
 	{
-		log_message($level, $this->_getCaller().$message);
+		log_message($level, $this->_getPrefix($this->_getCaller()).$message);
 	}
 
 	/**
-	 * _getCaller
+	 * Writes logs to database
+	 */
+	private function _logDB($level, $requestId, $data)
+	{
+		// If the _dbLogType parameter was not given when this library was loaded
+		// NOTE: this message will be displayed only to the developer AND stops the execution
+		if ($this->_dbLogType == null)
+		{
+			show_error('To log to database you need to specify the "'.self::P_NAME_DB_LOG_TYPE.'" parameter when the LogLib is loaded');
+		}
+
+		$ci =& get_instance(); // get code igniter instance
+
+		// If only debug log is enabed then is possible to write a debug log, otherwise...
+		if ($level == self::DEBUG && $ci->config->item(self::CI_LOG_THRESHOLD_NAME) != self::CI_LOG_THRESHOLD_DEBUG)
+		{
+			// ...do nothing
+		}
+		else
+		{
+			// Loads WebservicelogModel
+			$ci->load->model('system/Webservicelog_model', 'WebservicelogModel');
+
+			// Get caller data
+			$callerData = $this->_getCaller();
+
+			// Writes a log to database
+			$ci->WebservicelogModel->insert(array(
+				'webservicetyp_kurzbz' => $this->_dbLogType,
+				'request_id' => $requestId,
+				'beschreibung' => $this->_getDatabaseDescription($callerData),
+				'request_data' => $data,
+				'execute_user' => $this->_dbExecuteUser,
+				'execute_time' => 'NOW()' // current time
+			));
+		}
+	}
+
+	/**
+	 * Retrieves caller's data
 	 */
 	private function _getCaller()
 	{
-		$classIndex = 3;
-		$functionIndex = 3;
-		$lineIndex = 2;
 		$class = '';
 		$function = '';
 		$line = '';
 		$backtrace_arr = debug_backtrace();
-		if (isset($backtrace_arr[$classIndex]['class']) && $backtrace_arr[$classIndex]['class'] != '')
+
+		if (isset($backtrace_arr[$this->_classIndex]['class']) && $backtrace_arr[$this->_classIndex]['class'] != '')
 		{
-			$class = $backtrace_arr[$classIndex]['class'];
+			$class = $backtrace_arr[$this->_classIndex]['class'];
 		}
 
-		if (isset($backtrace_arr[$functionIndex]['function']) && $backtrace_arr[$functionIndex]['function'] != '')
+		if (isset($backtrace_arr[$this->_functionIndex]['function']) && $backtrace_arr[$this->_functionIndex]['function'] != '')
 		{
-			$function = $backtrace_arr[$functionIndex]['function'];
+			$function = $backtrace_arr[$this->_functionIndex]['function'];
 		}
 
-		if (isset($backtrace_arr[$lineIndex]['line']) && $backtrace_arr[$lineIndex]['line'] != '')
+		if (isset($backtrace_arr[$this->_lineIndex]['line']) && $backtrace_arr[$this->_lineIndex]['line'] != '')
 		{
-			$line = $backtrace_arr[$lineIndex]['line'];
+			$line = $backtrace_arr[$this->_lineIndex]['line'];
 		}
 
-		return $this->_format($class, $function, $line);
+		return array(
+			self::CLASS_NAME => $class,
+			self::FUNCTION_NAME => $function,
+			self::CODE_LINE => $line
+		);
 	}
 
 	/**
-	 * format
+	 * Formats the log message prefix (file system based)
 	 */
-	private function _format($class, $function, $line)
+	private function _getPrefix($callerData)
 	{
-		$formatted = LogLib::CALLER_PREFIX;
+		$formatted = self::CALLER_PREFIX;
 
-		if (!is_null($class) && $class != '')
+		if (!isEmptyString($callerData[self::CLASS_NAME]))
 		{
-			$formatted .= $class.LogLib::CLASS_POSTFIX;
+			$formatted .= $callerData[self::CLASS_NAME].self::CLASS_POSTFIX;
 		}
 
-		$formatted .= $function.LogLib::LINE_SEPARATOR.$line.LogLib::CALLER_POSTFIX.' ';
+		$formatted .= $callerData[self::FUNCTION_NAME].self::LINE_SEPARATOR.$callerData[self::CODE_LINE].self::CALLER_POSTFIX.' ';
+
+		return $formatted;
+	}
+
+	/**
+	 * Formats the database description for a log
+	 */
+	private function _getDatabaseDescription($callerData)
+	{
+		$formatted = $callerData[self::FUNCTION_NAME].self::LINE_SEPARATOR.$callerData[self::CODE_LINE];
+
+		if (!isEmptyString($callerData[self::CLASS_NAME]))
+		{
+			$formatted = $callerData[self::CLASS_NAME].self::CLASS_POSTFIX.$formatted;
+		}
 
 		return $formatted;
 	}
diff --git a/application/models/system/Webservicelog_model.php b/application/models/system/Webservicelog_model.php
index dc45b13a7..a5b23a396 100644
--- a/application/models/system/Webservicelog_model.php
+++ b/application/models/system/Webservicelog_model.php
@@ -1,13 +1,14 @@
 <?php
+
 class Webservicelog_model extends DB_Model
 {
-
 	/**
 	 * Constructor
 	 */
 	public function __construct()
 	{
 		parent::__construct();
+
 		$this->dbTable = 'system.tbl_webservicelog';
 		$this->pk = 'webservicelog_id';
 	}
diff --git a/public/css/FilterWidget.css b/public/css/FilterWidget.css
index 295dff8ec..5254268c7 100644
--- a/public/css/FilterWidget.css
+++ b/public/css/FilterWidget.css
@@ -113,3 +113,19 @@
 #applyFilter, #saveCustomFilterButton {
 	width: 100px;
 }
+
+.text-red {
+	color: red;
+}
+
+.text-orange {
+	color: orange;
+}
+
+.text-blue {
+	color: blue;
+}
+
+.text-green {
+	color: green;
+}
diff --git a/system/dbupdate_3.3.php b/system/dbupdate_3.3.php
index 4e720daef..1947debdb 100644
--- a/system/dbupdate_3.3.php
+++ b/system/dbupdate_3.3.php
@@ -3030,6 +3030,20 @@ if(!$result = @$db->db_query("SELECT stufe FROM public.tbl_dokumentstudiengang L
 		echo '<br>public.tbl_dokumentstudiengang: Spalte stufe hinzugefuegt';
 }
 
+// Add new webservice type in system.tbl_webservicetyp
+if ($result = @$db->db_query("SELECT 1 FROM system.tbl_webservicetyp WHERE webservicetyp_kurzbz = 'job';"))
+{
+	if ($db->db_num_rows($result) == 0)
+	{
+		$qry = "INSERT INTO system.tbl_webservicetyp(webservicetyp_kurzbz, beschreibung) VALUES('job', 'Cronjob');";
+
+		if (!$db->db_query($qry))
+			echo '<strong>system.tbl_webservicetyp '.$db->db_last_error().'</strong><br>';
+		else
+			echo ' system.tbl_webservicetyp: Added webservice type "job"<br>';
+	}
+}
+
 // *** Pruefung und hinzufuegen der neuen Attribute und Tabellen
 echo '<H2>Pruefe Tabellen und Attribute!</H2>';
 
diff --git a/system/filtersupdate.php b/system/filtersupdate.php
index 413b821af..2d1789774 100644
--- a/system/filtersupdate.php
+++ b/system/filtersupdate.php
@@ -353,7 +353,7 @@ $filters = array(
 					{"name": "fakultaet"},
 					{"name": "datum"},
 					{"name": "uhrzeit"},
-					{"name": "anmeldefrist"},					
+					{"name": "anmeldefrist"},
 					{"name": "oeffentlich"},
 					{"name": "studiengaenge"},
 					{"name": "freie_plaetze"},
@@ -460,6 +460,28 @@ $filters = array(
 			}
 		',
 		'oe_kurzbz' => null,
+	),
+	array(
+		'app' => 'core',
+		'dataset_name' => 'jobslogs',
+		'filter_kurzbz' => 'all',
+		'description' => '{All logs produced by jobs}',
+		'sort' => 1,
+		'default_filter' => true,
+		'filter' => '
+			{
+				"name": "All jobs viewer",
+				"columns": [
+					{"name": "RequestId"},
+					{"name": "ExecutionTime"},
+					{"name": "ExecutedBy"},
+					{"name": "Description"},
+					{"name": "Data"}
+				],
+				"filters": []
+			}
+		',
+		'oe_kurzbz' => null,
 	)
 );