diff --git a/src/ConfigurationIndex.php b/src/ConfigurationIndex.php
index 0fe02b8..cd471ca 100644
--- a/src/ConfigurationIndex.php
+++ b/src/ConfigurationIndex.php
@@ -11,6 +11,21 @@ class ConfigurationIndex
 	const TYPE_CONFIGURATION = 'configuration';
 	const PRIMARY_ID = 'primary';
 
+	/**
+	 * @var \Elasticsearch\Client
+	 */
+	private $engine;
+
+	/**
+	 * @var \Psr\Log\LoggerInterface
+	 */
+	private $logger;
+
+	/**
+	 * @var string
+	 */
+	private $configurationIndexName;
+
 	/**
 	 * Mapping for configuration index.
 	 *
diff --git a/src/IndexRotator.php b/src/IndexRotator.php
index fee9a10..525065e 100644
--- a/src/IndexRotator.php
+++ b/src/IndexRotator.php
@@ -38,6 +38,11 @@ class IndexRotator
 	 */
 	private $primaryIndexStrategy;
 
+	/**
+	 * @var \Psr\Log\LoggerInterface
+	 */
+	private $logger;
+
 	/**
 	 * Constructor.
 	 *
@@ -45,7 +50,7 @@ class IndexRotator
 	 * @param string $prefix Identifier for who's configuration this is intended.
 	 * @param Psr\Log\LoggerInterface $logger
 	 */
-	public function __construct(\Elasticsearch\Client $engine, $prefix, LoggerInterface $logger = null)
+	public function __construct(Client $engine, $prefix, LoggerInterface $logger = null)
 	{
 		$this->engine = $engine;
 		$this->logger = $logger ?: new NullLogger();
diff --git a/src/Strategy/AliasStrategy.php b/src/Strategy/AliasStrategy.php
index bf5f2ba..7bc4cf5 100644
--- a/src/Strategy/AliasStrategy.php
+++ b/src/Strategy/AliasStrategy.php
@@ -10,6 +10,22 @@
 
 class AliasStrategy implements PrimaryIndexStrategy
 {
+
+	/**
+	 * @var \Elasticsearch\Client
+	 */
+	private $engine;
+
+	/**
+	 * @var \Psr\Log\LoggerInterface
+	 */
+	private $logger;
+
+	/**
+	 * @var array
+	 */
+	private $options;
+
 	/**
 	 * Constructor.
 	 *
diff --git a/src/Strategy/ConfigurationStrategy.php b/src/Strategy/ConfigurationStrategy.php
index 5deecea..e7da764 100644
--- a/src/Strategy/ConfigurationStrategy.php
+++ b/src/Strategy/ConfigurationStrategy.php
@@ -11,6 +11,22 @@
 
 class ConfigurationStrategy implements PrimaryIndexStrategy
 {
+
+	/**
+	 * @var \Elasticsearch\Client
+	 */
+	private $engine;
+
+	/**
+	 * @var \Psr\Log\LoggerInterface
+	 */
+	private $logger;
+
+	/**
+	 * @var array
+	 */
+	private $options;
+
 	/**
 	 * Constructor.
 	 *