diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/database/tables/ChapterTable.java b/app/src/main/java/eu/kanade/tachiyomi/data/database/tables/ChapterTable.java
index 1aea2574d..f325bd6de 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/tables/ChapterTable.java
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/tables/ChapterTable.java
@@ -2,7 +2,7 @@ package eu.kanade.tachiyomi.data.database.tables;
 
 import android.support.annotation.NonNull;
 
-public class ChapterTable {
+public final class ChapterTable {
 
     @NonNull
     public static final String TABLE = "chapters";
@@ -34,6 +34,10 @@ public class ChapterTable {
 	@NonNull
 	public static final String COLUMN_CHAPTER_NUMBER = "chapter_number";
 
+	private ChapterTable() throws InstantiationException {
+		throw new InstantiationException("This class is not for instantiation");
+	}
+
 	@NonNull
 	public static String getCreateTableQuery() {
 		return "CREATE TABLE " + TABLE + "("
diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/database/tables/MangaSyncTable.java b/app/src/main/java/eu/kanade/tachiyomi/data/database/tables/MangaSyncTable.java
index c8dadeb60..0c4861fef 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/database/tables/MangaSyncTable.java
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/database/tables/MangaSyncTable.java
@@ -2,7 +2,7 @@ package eu.kanade.tachiyomi.data.database.tables;
 
 import android.support.annotation.NonNull;
 
-public class MangaSyncTable {
+public final class MangaSyncTable {
 
     public static final String TABLE = "manga_sync";
 
@@ -24,6 +24,10 @@ public class MangaSyncTable {
 
     public static final String COLUMN_TOTAL_CHAPTERS = "total_chapters";
 
+    private MangaSyncTable() throws InstantiationException {
+        throw new InstantiationException("This class is not for instantiation");
+    }
+
     @NonNull
     public static String getCreateTableQuery() {
         return "CREATE TABLE " + TABLE + "("
diff --git a/app/src/main/java/eu/kanade/tachiyomi/util/AndroidComponentUtil.java b/app/src/main/java/eu/kanade/tachiyomi/util/AndroidComponentUtil.java
index cc261b93a..9b9402519 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/util/AndroidComponentUtil.java
+++ b/app/src/main/java/eu/kanade/tachiyomi/util/AndroidComponentUtil.java
@@ -8,7 +8,11 @@ import android.content.pm.PackageManager;
 
 import timber.log.Timber;
 
-public class AndroidComponentUtil {
+public final class AndroidComponentUtil {
+
+    private AndroidComponentUtil() throws InstantiationException {
+        throw new InstantiationException("This class is not for instantiation");
+    }
 
     public static void toggleComponent(Context context, Class componentClass, boolean enable) {
         Timber.i((enable ? "Enabling " : "Disabling ") + componentClass.getSimpleName());
diff --git a/app/src/main/java/eu/kanade/tachiyomi/util/ChapterRecognition.java b/app/src/main/java/eu/kanade/tachiyomi/util/ChapterRecognition.java
index 08fa0f4b7..bd4f40802 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/util/ChapterRecognition.java
+++ b/app/src/main/java/eu/kanade/tachiyomi/util/ChapterRecognition.java
@@ -8,7 +8,7 @@ import java.util.regex.Pattern;
 import eu.kanade.tachiyomi.data.database.models.Chapter;
 import eu.kanade.tachiyomi.data.database.models.Manga;
 
-public class ChapterRecognition {
+public final class ChapterRecognition {
 
     private static final Pattern cleanWithToken = Pattern.compile("ch[^0-9]?\\s*(\\d+[\\.,]?\\d+)($|\\b)");
     private static final Pattern uncleanWithToken = Pattern.compile("ch[^0-9]?\\s*(\\d+[\\.,]?\\d*)");
@@ -23,6 +23,10 @@ public class ChapterRecognition {
     private static final Pattern pPart =
             Pattern.compile("(\\b|\\d)part\\s*\\d+.+");
 
+    private ChapterRecognition() throws InstantiationException {
+        throw new InstantiationException("This class is not for instantiation");
+    }
+
     public static void parseChapterNumber(Chapter chapter, Manga manga) {
         if (chapter.chapter_number != -1)
             return;
diff --git a/app/src/main/java/eu/kanade/tachiyomi/util/GLUtil.java b/app/src/main/java/eu/kanade/tachiyomi/util/GLUtil.java
index 53f69b847..f60376524 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/util/GLUtil.java
+++ b/app/src/main/java/eu/kanade/tachiyomi/util/GLUtil.java
@@ -5,7 +5,11 @@ import javax.microedition.khronos.egl.EGLConfig;
 import javax.microedition.khronos.egl.EGLContext;
 import javax.microedition.khronos.egl.EGLDisplay;
 
-public class GLUtil {
+public final class GLUtil {
+
+    private GLUtil() throws InstantiationException {
+        throw new InstantiationException("This class is not for instantiation");
+    }
 
     public static int getMaxTextureSize() {
         // Safe minimum default size
diff --git a/app/src/main/java/eu/kanade/tachiyomi/util/Parser.java b/app/src/main/java/eu/kanade/tachiyomi/util/Parser.java
index bad9854a2..282663c57 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/util/Parser.java
+++ b/app/src/main/java/eu/kanade/tachiyomi/util/Parser.java
@@ -5,7 +5,11 @@ import android.support.annotation.Nullable;
 import org.jsoup.nodes.Element;
 import org.jsoup.select.Elements;
 
-public class Parser {
+public final class Parser {
+
+    private Parser() throws InstantiationException {
+        throw new InstantiationException("This class is not for instantiation");
+    }
 
     @Nullable
     public static Element element(Element container, String pattern) {
diff --git a/app/src/main/java/eu/kanade/tachiyomi/util/UrlUtil.java b/app/src/main/java/eu/kanade/tachiyomi/util/UrlUtil.java
index baf7ce9dc..b877867bd 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/util/UrlUtil.java
+++ b/app/src/main/java/eu/kanade/tachiyomi/util/UrlUtil.java
@@ -3,12 +3,16 @@ package eu.kanade.tachiyomi.util;
 import java.net.URI;
 import java.net.URISyntaxException;
 
-public class UrlUtil {
+public final class UrlUtil {
 
     private static final String JPG = ".jpg";
     private static final String PNG = ".png";
     private static final String GIF = ".gif";
 
+    private UrlUtil() throws InstantiationException {
+        throw new InstantiationException("This class is not for instantiation");
+    }
+
     public static String getPath(String s) {
         try {
             URI uri = new URI(s);