Add Connection entity.

README.md

@@ -1,7 +1,7 @@
 1. Configure php extension euspe by documentation (docs/EUSPHPE-20180505/Documentation/EUSignPHPDescription.doc)
     1. Remove osplm.ini from extension directory. 
     1. Add to apache envvars ```LD_LIBRARY_PATH=/server/path/vendor/uis/euspe/servers/default```
-1. Configure stubs for IDE to view functions docs.
+1. Configure stubs for IDE to view functions docs (https://github.com/andrew-svirin/phpstorm-stubs).
 1. Configure directories for servers, certificates, keys. 
    Look for osplm.dist.ini as example.
    Setup 0777 permissions on folders.

src/Connection.php

@@ -0,0 +1,44 @@
+<?php
+
+namespace AndrewSvirin\EUSPE;
+
+class Connection
+{
+
+    /**
+     * @var KeyRing
+     */
+    private $keyRing;
+
+    /**
+     * @var Certificate
+     */
+    private $certificate;
+
+    /**
+     * @var Server
+     */
+    private $server;
+
+    public function __construct(KeyRing $keyRing, Certificate $certificate, Server $server)
+    {
+        $this->keyRing = $keyRing;
+        $this->certificate = $certificate;
+        $this->server = $server;
+    }
+
+    public function getKeyRing(): KeyRing
+    {
+        return $this->keyRing;
+    }
+
+    public function getCertificate(): Certificate
+    {
+        return $this->certificate;
+    }
+
+    public function getServer(): Server
+    {
+        return $this->server;
+    }
+}