fix: resolve some sonar critical issues

jadx-core/src/main/java/jadx/core/dex/attributes/EmptyAttrStorage.java

@@ -34,18 +34,22 @@ public final class EmptyAttrStorage extends AttributeStorage {
 
 	@Override
 	public void clear() {
+		// ignore
 	}
 
 	@Override
 	public void remove(AFlag flag) {
+		// ignore
 	}
 
 	@Override
 	public <T extends IAttribute> void remove(AType<T> type) {
+		// ignore
 	}
 
 	@Override
 	public void remove(IAttribute attr) {
+		// ignore
 	}
 
 	@Override

jadx-core/src/main/java/jadx/core/dex/attributes/IAttribute.java

@@ -1,5 +1,5 @@
 package jadx.core.dex.attributes;
 
 public interface IAttribute {
-	AType<? extends IAttribute> getType();
+	<T extends IAttribute> AType<T> getType();
 }

jadx-core/src/main/java/jadx/core/dex/instructions/GotoNode.java

@@ -1,6 +1,5 @@
 package jadx.core.dex.instructions;
 
-import jadx.core.dex.nodes.BlockNode;
 import jadx.core.utils.InsnUtils;
 
 public class GotoNode extends TargetInsnNode {
@@ -20,15 +19,6 @@ public class GotoNode extends TargetInsnNode {
 		return target;
 	}
 
-	@Override
-	public boolean replaceTargetBlock(BlockNode origin, BlockNode replace) {
-		return false;
-	}
-
-	@Override
-	public void initBlocks(BlockNode curBlock) {
-	}
-
 	@Override
 	public String toString() {
 		return super.toString() + "-> " + InsnUtils.formatOffset(target);

jadx-core/src/main/java/jadx/core/dex/instructions/TargetInsnNode.java

@@ -9,7 +9,10 @@ public abstract class TargetInsnNode extends InsnNode {
 		super(type, argsCount);
 	}
 
-	public abstract void initBlocks(BlockNode curBlock);
+	public void initBlocks(BlockNode curBlock) {
+	}
 
-	public abstract boolean replaceTargetBlock(BlockNode origin, BlockNode replace);
+	public boolean replaceTargetBlock(BlockNode origin, BlockNode replace) {
+		return false;
+	}
 }

jadx-gui/src/main/java/jadx/gui/settings/JadxSettings.java

@@ -276,7 +276,7 @@ public class JadxSettings extends JadxCLIArgs {
 			fromVersion++;
 		}
 		if (fromVersion == 1) {
-			setEditorThemePath(EditorTheme.ALL_THEMES[0].getPath());
+			setEditorThemePath(EditorTheme.getDefaultTheme().getPath());
 			fromVersion++;
 		}
 		if (fromVersion == 2) {

jadx-gui/src/main/java/jadx/gui/settings/JadxSettingsWindow.java

@@ -190,7 +190,7 @@ public class JadxSettingsWindow extends JDialog {
 			}
 		});
 
-		EditorTheme[] editorThemes = EditorTheme.ALL_THEMES;
+		EditorTheme[] editorThemes = EditorTheme.getAllThemes();
 		JComboBox<EditorTheme> themesCbx = new JComboBox<>(editorThemes);
 		for (EditorTheme theme : editorThemes) {
 			if (theme.getPath().equals(settings.getEditorThemePath())) {

jadx-gui/src/main/java/jadx/gui/ui/codearea/EditorTheme.java

@@ -3,7 +3,7 @@ package jadx.gui.ui.codearea;
 public final class EditorTheme {
 	private static final String RSTA_THEME_PATH = "/org/fife/ui/rsyntaxtextarea/themes/";
 
-	public static final EditorTheme[] ALL_THEMES =
+	private static final EditorTheme[] ALL_THEMES =
 			new EditorTheme[]{
 					new EditorTheme("default"),
 					new EditorTheme("eclipse"),
@@ -13,6 +13,14 @@ public final class EditorTheme {
 					new EditorTheme("monokai")
 			};
 
+	public static EditorTheme[] getAllThemes() {
+		return ALL_THEMES;
+	}
+
+	public static EditorTheme getDefaultTheme() {
+		return ALL_THEMES[0];
+	}
+
 	private final String name;
 	private final String path;