Change @return Exception to @throws Exception

src/Storage/Adapter/Dba.php

@@ -303,7 +303,7 @@ public function getIterator()
      * Optimize the storage
      *
      * @return bool
-     * @return Exception\RuntimeException
+     * @throws Exception\RuntimeException
      */
     public function optimize()
     {

src/Storage/Adapter/Filesystem.php

@@ -441,7 +441,7 @@ public function getIterator()
      * Optimize the storage
      *
      * @return bool
-     * @return Exception\RuntimeException
+     * @throws Exception\RuntimeException
      */
     public function optimize()
     {

src/Storage/Adapter/MemcacheOptions.php

@@ -241,7 +241,7 @@ public function setAutoCompressMinSavings($minSavings)
     /**
      * Get compress min savings
      *
-     * @return Exception\RuntimeException
+     * @throws Exception\RuntimeException
      */
     public function getAutoCompressMinSavings()
     {

src/Storage/Adapter/Memcached.php

@@ -630,7 +630,7 @@ protected function expirationTime()
      * Generate exception based of memcached result code
      *
      * @param int $code
-     * @return Exception\RuntimeException
+     * @throws Exception\RuntimeException
      * @throws Exception\InvalidArgumentException On success code
      */
     protected function getExceptionByResultCode($code)