Fix CS and add chainability to a few more setter methods, refs #221

src/Monolog/Handler/AbstractHandler.php

@@ -77,6 +77,8 @@ abstract class AbstractHandler implements HandlerInterface
             throw new \InvalidArgumentException('Processors must be valid callables (callback or object with an __invoke method), '.var_export($callback, true).' given');
         }
         array_unshift($this->processors, $callback);
+
+        return $this;
     }
 
     /**
@@ -97,7 +99,7 @@ abstract class AbstractHandler implements HandlerInterface
     public function setFormatter(FormatterInterface $formatter)
     {
         $this->formatter = $formatter;
-        
+
         return $this;
     }
 
@@ -116,11 +118,14 @@ abstract class AbstractHandler implements HandlerInterface
     /**
      * Sets minimum logging level at which this handler will be triggered.
      *
-     * @param integer $level
+     * @param  integer $level
+     * @return self
      */
     public function setLevel($level)
     {
         $this->level = $level;
+
+        return $this;
     }
 
     /**
@@ -138,10 +143,13 @@ abstract class AbstractHandler implements HandlerInterface
      *
      * @param Boolean $bubble True means that bubbling is not permitted.
      *                        False means that this handler allows bubbling.
+     * @return self
      */
     public function setBubble($bubble)
     {
         $this->bubble = $bubble;
+
+        return $this;
     }
 
     /**