diff --git a/app/src/main/java/org/schabi/newpipe/DownloaderImpl.java b/app/src/main/java/org/schabi/newpipe/DownloaderImpl.java
index 9f1722fb3..1abdeb504 100644
--- a/app/src/main/java/org/schabi/newpipe/DownloaderImpl.java
+++ b/app/src/main/java/org/schabi/newpipe/DownloaderImpl.java
@@ -45,7 +45,8 @@ public final class DownloaderImpl extends Downloader {
     public static final String USER_AGENT
             = "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Firefox/68.0";
 
-    public static final String YOUTUBE_AGE_RESTRICTED_CONTENT_COOKIE_KEY = "youtube_age_restricted_content_cookie_key";
+    public static final String YOUTUBE_AGE_RESTRICTED_CONTENT_COOKIE_KEY =
+            "youtube_age_restricted_content_cookie_key";
     public static final String YOUTUBE_AGE_RESTRICTED_CONTENT_COOKIE = "PREF=f2=8000000";
     public static final String YOUTUBE_DOMAIN = "youtube.com";
 
@@ -146,27 +147,30 @@ public final class DownloaderImpl extends Downloader {
         return CookieUtils.concatCookies(resultCookies);
     }
 
-    public String getCookie(final String key){
+    public String getCookie(final String key) {
         return mCookies.get(key);
     }
 
-    public void setCookie(final String key, final String cookie){
+    public void setCookie(final String key, final String cookie) {
         mCookies.put(key, cookie);
     }
 
-    public void removeCookie(final String key){
+    public void removeCookie(final String key) {
         mCookies.remove(key);
     }
 
-    public void updateAgeRestrictedContentCookies(final Context context){
-        String showAgeRestrictedContentKey = context.getString(R.string.show_age_restricted_content);
-        boolean showAgeRestrictedContent = PreferenceManager.getDefaultSharedPreferences(context).getBoolean(showAgeRestrictedContentKey, false);
+    public void updateAgeRestrictedContentCookies(final Context context) {
+        String showAgeRestrictedContentKey =
+                context.getString(R.string.show_age_restricted_content);
+        boolean showAgeRestrictedContent = PreferenceManager.getDefaultSharedPreferences(context)
+                .getBoolean(showAgeRestrictedContentKey, false);
         updateAgeRestrictedContentCookies(showAgeRestrictedContent);
     }
 
-    public void updateAgeRestrictedContentCookies(boolean showAgeRestrictedContent) {
+    public void updateAgeRestrictedContentCookies(final boolean showAgeRestrictedContent) {
         if (!showAgeRestrictedContent) {
-            setCookie(YOUTUBE_AGE_RESTRICTED_CONTENT_COOKIE_KEY, YOUTUBE_AGE_RESTRICTED_CONTENT_COOKIE);
+            setCookie(YOUTUBE_AGE_RESTRICTED_CONTENT_COOKIE_KEY,
+                    YOUTUBE_AGE_RESTRICTED_CONTENT_COOKIE);
         } else {
             removeCookie(YOUTUBE_AGE_RESTRICTED_CONTENT_COOKIE_KEY);
         }
diff --git a/app/src/main/java/org/schabi/newpipe/fragments/MainFragment.java b/app/src/main/java/org/schabi/newpipe/fragments/MainFragment.java
index 929d573b0..9cb21f4e7 100644
--- a/app/src/main/java/org/schabi/newpipe/fragments/MainFragment.java
+++ b/app/src/main/java/org/schabi/newpipe/fragments/MainFragment.java
@@ -71,7 +71,9 @@ public class MainFragment extends BaseFragment implements TabLayout.OnTabSelecte
         });
 
         showAgeRestrictedContentKey = getString(R.string.show_age_restricted_content);
-        previousShowAgeRestrictedContent = PreferenceManager.getDefaultSharedPreferences(getContext()).getBoolean(showAgeRestrictedContentKey, false);
+        previousShowAgeRestrictedContent =
+                PreferenceManager.getDefaultSharedPreferences(getContext())
+                        .getBoolean(showAgeRestrictedContentKey, false);
     }
 
     @Override
@@ -98,7 +100,9 @@ public class MainFragment extends BaseFragment implements TabLayout.OnTabSelecte
     public void onResume() {
         super.onResume();
 
-        boolean showAgeRestrictedContent = PreferenceManager.getDefaultSharedPreferences(getContext()).getBoolean(showAgeRestrictedContentKey, false);
+        boolean showAgeRestrictedContent =
+                PreferenceManager.getDefaultSharedPreferences(getContext())
+                        .getBoolean(showAgeRestrictedContentKey, false);
         if (previousShowAgeRestrictedContent != showAgeRestrictedContent) {
             previousShowAgeRestrictedContent = showAgeRestrictedContent;
             setupTabs();
diff --git a/app/src/main/java/org/schabi/newpipe/util/CookieUtils.java b/app/src/main/java/org/schabi/newpipe/util/CookieUtils.java
index e10b83df6..4575e7017 100644
--- a/app/src/main/java/org/schabi/newpipe/util/CookieUtils.java
+++ b/app/src/main/java/org/schabi/newpipe/util/CookieUtils.java
@@ -1,24 +1,17 @@
 package org.schabi.newpipe.util;
 
-import android.content.Context;
-import android.preference.PreferenceManager;
-
 import org.jsoup.helper.StringUtil;
-import org.schabi.newpipe.DownloaderImpl;
-import org.schabi.newpipe.R;
 
 import java.util.Arrays;
 import java.util.Collection;
-import java.util.HashMap;
 import java.util.HashSet;
-import java.util.Map;
 import java.util.Set;
 
-public class CookieUtils {
+public final class CookieUtils {
     private CookieUtils() {
     }
 
-    public static String concatCookies(Collection<String> cookieStrings) {
+    public static String concatCookies(final Collection<String> cookieStrings) {
         Set<String> cookieSet = new HashSet<>();
         for (String cookies : cookieStrings) {
             cookieSet.addAll(splitCookies(cookies));
@@ -26,7 +19,7 @@ public class CookieUtils {
         return StringUtil.join(cookieSet, "; ").trim();
     }
 
-    public static Set<String> splitCookies(String cookies) {
+    public static Set<String> splitCookies(final String cookies) {
         return new HashSet<>(Arrays.asList(cookies.split("; *")));
     }
 }