Add injector/mapper main classes/entrypoints. Maybe should make those tests use these?

src/main/java/net/runelite/deob/updater/UpdateInject.java

@@ -0,0 +1,42 @@
+package net.runelite.deob.updater;
+
+import java.io.File;
+import java.io.IOException;
+import net.runelite.asm.ClassGroup;
+import net.runelite.deob.injection.Inject;
+import net.runelite.deob.util.JarUtil;
+
+public class UpdateInject
+{
+	private final ClassGroup deobfuscated, vanilla;
+
+	public UpdateInject(ClassGroup deobfuscated, ClassGroup vanilla)
+	{
+		this.deobfuscated = deobfuscated;
+		this.vanilla = vanilla;
+	}
+
+	public void inject()
+	{
+		Inject instance = new Inject(deobfuscated, vanilla);
+		instance.run();
+	}
+
+	public void save(File out) throws IOException
+	{
+		JarUtil.saveJar(vanilla, out);
+	}
+
+	public static void main(String[] args) throws IOException
+	{
+		if (args.length < 3)
+			System.exit(-1);
+		
+		UpdateInject u = new UpdateInject(
+			JarUtil.loadJar(new File(args[0])),
+			JarUtil.loadJar(new File(args[1]))
+		);
+		u.inject();
+		u.save(new File(args[2]));
+	}
+}

src/main/java/net/runelite/deob/updater/UpdateMappings.java

@@ -0,0 +1,48 @@
+package net.runelite.deob.updater;
+
+import java.io.File;
+import java.io.IOException;
+import net.runelite.asm.ClassGroup;
+import net.runelite.deob.deobfuscators.rename.AnnotationMapper;
+import net.runelite.deob.deobfuscators.rename.Mapper;
+import net.runelite.deob.deobfuscators.rename.ParallelExecutorMapping;
+import net.runelite.deob.util.JarUtil;
+
+public class UpdateMappings
+{
+	private final ClassGroup group1, group2;
+
+	public UpdateMappings(ClassGroup group1, ClassGroup group2)
+	{
+		this.group1 = group1;
+		this.group2 = group2;
+	}
+
+	public void update()
+	{
+		Mapper mapper = new Mapper(group1, group2);
+		mapper.run();
+		ParallelExecutorMapping mapping = mapper.getMapping();
+
+		AnnotationMapper amapper = new AnnotationMapper(group1, group2, mapping);
+		amapper.run();
+	}
+
+	public void save(File out) throws IOException
+	{
+		JarUtil.saveJar(group2, out);
+	}
+
+	public static void main(String[] args) throws IOException
+	{
+		if (args.length < 3)
+			System.exit(-1);
+
+		UpdateMappings u = new UpdateMappings(
+			JarUtil.loadJar(new File(args[0])),
+			JarUtil.loadJar(new File(args[1]))
+		);
+		u.update();
+		u.save(new File(args[2]));
+	}
+}