diff --git a/src/org/geometerplus/fbreader/formats/FormatPlugin.java b/src/org/geometerplus/fbreader/formats/FormatPlugin.java
index 43d2283c3..f21fbdcc3 100644
--- a/src/org/geometerplus/fbreader/formats/FormatPlugin.java
+++ b/src/org/geometerplus/fbreader/formats/FormatPlugin.java
@@ -26,7 +26,16 @@ import org.geometerplus.fbreader.bookmodel.BookModel;
 import org.geometerplus.fbreader.library.Book;
 
 public abstract class FormatPlugin {
-	public abstract String supportedFileType();
+	private final String myFileType;
+
+	protected FormatPlugin(String fileType) {
+		myFileType = fileType;
+	}
+
+	public final String supportedFileType() {
+		return myFileType;
+	}
+
 	public abstract boolean readMetaInfo(Book book);
 	public abstract boolean readLanguageAndEncoding(Book book);
 	public abstract boolean readModel(BookModel model);
diff --git a/src/org/geometerplus/fbreader/formats/JavaFormatPlugin.java b/src/org/geometerplus/fbreader/formats/JavaFormatPlugin.java
index 636eb5829..f7f2d4278 100644
--- a/src/org/geometerplus/fbreader/formats/JavaFormatPlugin.java
+++ b/src/org/geometerplus/fbreader/formats/JavaFormatPlugin.java
@@ -22,6 +22,10 @@ package org.geometerplus.fbreader.formats;
 import org.geometerplus.fbreader.library.Book;
 
 public abstract class JavaFormatPlugin extends FormatPlugin {
+	protected JavaFormatPlugin(String fileType) {
+		super(fileType);
+	}
+
 	@Override
 	public boolean readLanguageAndEncoding(Book book) {
 		return true;
diff --git a/src/org/geometerplus/fbreader/formats/NativeFormatPlugin.java b/src/org/geometerplus/fbreader/formats/NativeFormatPlugin.java
index 273bd92fe..8847fdd7c 100644
--- a/src/org/geometerplus/fbreader/formats/NativeFormatPlugin.java
+++ b/src/org/geometerplus/fbreader/formats/NativeFormatPlugin.java
@@ -29,18 +29,13 @@ import org.geometerplus.fbreader.library.Book;
 public class NativeFormatPlugin extends FormatPlugin {
 	private static Object ourCoversLock = new Object();
 
-	// Stores native C++ pointer value
 	// No free method because all plugins' instances are freed by 
 	//   PluginCollection::deleteInstance method (C++)
-	protected final long myNativePointer;
 
-	public NativeFormatPlugin(long ptr) {
-		myNativePointer = ptr;
+	public NativeFormatPlugin(String fileType) {
+		super(fileType);
 	}
 
-	@Override
-	public native String supportedFileType();
-
 	@Override
 	public native boolean readMetaInfo(Book book);
 
diff --git a/src/org/geometerplus/fbreader/formats/fb2/FB2Plugin.java b/src/org/geometerplus/fbreader/formats/fb2/FB2Plugin.java
index 9e5381e72..6fa49abcf 100644
--- a/src/org/geometerplus/fbreader/formats/fb2/FB2Plugin.java
+++ b/src/org/geometerplus/fbreader/formats/fb2/FB2Plugin.java
@@ -26,9 +26,8 @@ import org.geometerplus.zlibrary.core.filesystem.ZLFile;
 import org.geometerplus.zlibrary.core.image.ZLImage;
 
 public class FB2Plugin extends JavaFormatPlugin {
-	@Override
-	public String supportedFileType() {
-		return "fb2";
+	public FB2Plugin() {
+		super("fb2");
 	}
 
 	@Override
diff --git a/src/org/geometerplus/fbreader/formats/oeb/OEBPlugin.java b/src/org/geometerplus/fbreader/formats/oeb/OEBPlugin.java
index 48342f0d5..95f080a38 100644
--- a/src/org/geometerplus/fbreader/formats/oeb/OEBPlugin.java
+++ b/src/org/geometerplus/fbreader/formats/oeb/OEBPlugin.java
@@ -26,9 +26,8 @@ import org.geometerplus.zlibrary.core.filesystem.*;
 import org.geometerplus.zlibrary.core.image.ZLImage;
 
 public class OEBPlugin extends JavaFormatPlugin {
-	@Override
-	public String supportedFileType() {
-		return "ePub";
+	public OEBPlugin() {
+		super("ePub");
 	}
 
 	private ZLFile getOpfFile(ZLFile oebFile) {
diff --git a/src/org/geometerplus/fbreader/formats/pdb/MobipocketPlugin.java b/src/org/geometerplus/fbreader/formats/pdb/MobipocketPlugin.java
index 3b8fc341a..821d0127b 100644
--- a/src/org/geometerplus/fbreader/formats/pdb/MobipocketPlugin.java
+++ b/src/org/geometerplus/fbreader/formats/pdb/MobipocketPlugin.java
@@ -33,9 +33,8 @@ import org.geometerplus.fbreader.bookmodel.BookModel;
 import org.geometerplus.fbreader.formats.JavaFormatPlugin;
 
 public class MobipocketPlugin extends JavaFormatPlugin {
-	@Override
-	public String supportedFileType() {
-		return "Mobipocket";
+	public MobipocketPlugin() {
+		super("Mobipocket");
 	}
 
 	@Override