[java-decompiler] common file comparison method extracted; test data updated

testData/bulk/META-INF/MANIFEST.MF

@@ -0,0 +1,3 @@
+Manifest-Version: 1.0
+Created-By: 1.8.0_20 (Oracle Corporation)
+

testData/bulk/pkg/Main.java

@@ -0,0 +1,11 @@
+package pkg;
+
+import pkg.res.Loader;
+
+public class Main {
+   public static void main(String[] args) {
+      Loader loader = new Loader();
+      String resource = loader.getResource();
+      System.out.println(resource);
+   }
+}

testData/bulk/pkg/res/Loader.java

@@ -0,0 +1,25 @@
+package pkg.res;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.net.URL;
+
+public class Loader {
+   public String getResource() {
+      URL resource = this.getClass().getClassLoader().getResource("pkg/res/resource.txt");
+      if(resource == null) {
+         throw new RuntimeException("Resource missing");
+      } else {
+         try {
+            File e = new File(resource.toURI());
+            byte[] bytes = new byte[(int)e.length()];
+            FileInputStream stream = new FileInputStream(e);
+            stream.read(bytes);
+            stream.close();
+            return new String(bytes, "UTF-8");
+         } catch (Exception var5) {
+            throw new RuntimeException("Resource load failed", var5);
+         }
+      }
+   }
+}