public static Map<String, String> convertToProperties(String s) throws JSONException {
         JSONObject json = new JSONObject(s);
 
-        Map<String, Object> wm = new HashMap<String, Object>();
+        Map<String, Object> wm = new HashMap<>();
         Iterator<String> ii = json.keys();
         while (ii.hasNext()) {
             String key1 = ii.next();
             wm.put(key1, json.get(key1));
         }
 
-        Map<String, String> mm = new HashMap<String, String>();
+        Map<String, String> mm = new HashMap<>();
 
         while (!wm.isEmpty())
             for (String key : new ArrayList<>(wm.keySet())) {
 
                         mm = JsonParser.convertToProperties(r.body);
 
                     if (mm != null)
-                        for (String key : mm.keySet())
-                            ctx.setAttribute(pp + key, mm.get(key));
+                        for (Map.Entry<String,String> entry : mm.entrySet())
+                            ctx.setAttribute(pp + entry.getKey(), entry.getValue());
                 }
             }
         } catch (Exception e) {
     }
 
     protected Set<String> getListNameList(Map<String, String> paramMap) {
-        Set<String> ll = new HashSet<String>();
+        Set<String> ll = new HashSet<>();
         for (Map.Entry<String,String> entry : paramMap.entrySet())
             if (entry.getKey().startsWith("listName"))
                 ll.add(entry.getValue());
     }
 
     protected SSLContext createSSLContext(Parameters p) {
-        try {
+        try (FileInputStream in = new FileInputStream(p.keyStoreFileName)) {
             System.setProperty("jsse.enableSNIExtension", "false");
             System.setProperty("javax.net.ssl.trustStore", p.trustStoreFileName);
             System.setProperty("javax.net.ssl.trustStorePassword", p.trustStorePassword);
             });
 
             KeyManagerFactory kmf = KeyManagerFactory.getInstance(KeyManagerFactory.getDefaultAlgorithm());
-            FileInputStream in = new FileInputStream(p.keyStoreFileName);
             KeyStore ks = KeyStore.getInstance("PKCS12");
             char[] pwd = p.keyStorePassword.toCharArray();
             ks.load(in, pwd);