Allows non write adapters

* Renamed `AdapterInterface` to `WritableInterface`
 * Constructor now allows different adapter implementations
 * Check that adapter implements `WritableInterface` during data send

src/Adapter/AdapterAbstract.php

@@ -2,22 +2,17 @@
 namespace InfluxDB\Adapter;
 
 use InfluxDB\Options;
+use InfluxDB\Adapter\WritableInterface;
 
-abstract class AdapterAbstract implements AdapterInterface
+abstract class AdapterAbstract implements WritableInterface
 {
     private $options;
 
-    /**
-     * @param Options $options
-     */
     public function __construct(Options $options)
     {
         $this->options = $options;
     }
 
-    /**
-     * @return Options
-     */
     public function getOptions()
     {
         return $this->options;

src/Adapter/AdapterInterface.php

@@ -1,15 +0,0 @@
-<?php
-namespace InfluxDB\Adapter;
-
-/**
- * Every InfluxDB adapter implements this interface
- */
-interface AdapterInterface
-{
-    /**
-     * Send series into database
-     * @param mixed $message
-     * @param string|boolean $timePrecision
-     */
-    public function send(array $message);
-}

src/Adapter/WritableInterface.php

@@ -0,0 +1,7 @@
+<?php
+namespace InfluxDB\Adapter;
+
+interface WritableInterface
+{
+    public function send(array $message);
+}

src/Client.php

@@ -2,6 +2,7 @@
 
 namespace InfluxDB;
 
+use InfluxDB\Adapter\WritableInterface;
 use InfluxDb\Adapter\QueryableInterface;
 
 /**
@@ -11,7 +12,7 @@ class Client
 {
     private $adapter;
 
-    public function __construct(Adapter\AdapterInterface $adapter)
+    public function __construct($adapter)
     {
         $this->adapter = $adapter;
         return $this;
@@ -24,6 +25,10 @@ class Client
 
     public function mark($name, array $values = [])
     {
+        if (!($this->getAdapter() instanceOf WritableInterface)) {
+            throw new  \BadMethodCallException("You can write data to database only if the adapter supports it!");
+        }
+
         $data = $name;
         if (!is_array($name)) {
             $data =[];