Improved quality of docblock comments

src/Signal/SignalHandler.php

@@ -9,6 +9,13 @@ class SignalHandler
 
     private $callbacks;
 
+    /**
+     * Constructor, should only be called once for each signal but can have
+     * multiple handlers attached.
+     *
+     * @param integer $signo
+     * @param array $callbacks
+     */
     public function __construct(int $signo, array $callbacks=[])
     {
         $this->signo = $signo;
@@ -21,11 +28,23 @@ class SignalHandler
 
     }
 
+    /**
+     * Append a handler to the signal
+     *
+     * @param callable $handler
+     * @return void
+     */
     public function addHandler(callable $handler):void
     {
         $this->callbacks[] = $handler;
     }
 
+    /**
+     * Callback for signals
+     *
+     * @param int $signo
+     * @return void
+     */
     public function onSignal($signo)
     {
         foreach ($this->callbacks as $callback) {