Use try-with-resources in all other situations that can use it

src/main/java/net/md_5/specialsource/Jar.java

@@ -141,16 +141,10 @@ public class Jar implements Closeable {
      */
     public ClassNode getNode(String clazz) {
         // No luck, so lets try read it
-        try {
-            InputStream is = getClass(clazz);
+        try (InputStream is = getClass(clazz)) {
             if (is != null) {
-                ClassReader cr;
+                ClassReader cr = new ClassReader(is);
                 // Process it
-                try {
-                    cr = new ClassReader(is);
-                } finally {
-                    is.close();
-                }
                 ClassNode node = new ClassNode();
                 cr.accept(node, 0);
 

src/main/java/net/md_5/specialsource/JarMapping.java

@@ -486,13 +486,6 @@ public class JarMapping {
 
         this.newJar = newJar;
 
-        PrintWriter out;
-        if (logfile == null) {
-            out = new PrintWriter(System.out);
-        } else {
-            out = new PrintWriter(logfile);
-        }
-
         MappingWriter srgWriter = (compact) ? new CompactSearge(oldJar.jar.getFilename(), newJar.jar.getFilename()) : new Searge(oldJar.jar.getFilename(), newJar.jar.getFilename());
 
 
@@ -528,6 +521,8 @@ public class JarMapping {
             }
         }
 
+        try (PrintWriter out = (logfile != null ? new PrintWriter(System.out) : new PrintWriter(logfile))) {
             srgWriter.write(out);
         }
+    }
 }

src/main/java/net/md_5/specialsource/JarRemapper.java

@@ -169,18 +169,16 @@ public class JarRemapper extends CustomRemapper {
      * Remap all the classes in a jar, writing a new jar to the target
      */
     public void remapJar(Jar jar, File target) throws IOException {
-        JarOutputStream out = new JarOutputStream(new FileOutputStream(target));
-        ClassRepo repo = new JarRepo(jar);
-        try {
         if (jar == null) {
             return;
         }
+        ClassRepo repo = new JarRepo(jar);
+        try (JarOutputStream out = new JarOutputStream(new FileOutputStream(target))) {
             for (String name : jar.getEntryNames()) {
 
                 JarEntry entry;
 
-                InputStream is = jar.getResource(name);
-                try {
+                try (InputStream is = jar.getResource(name)) {
                     byte[] data;
                     if (name.endsWith(".class")) {
                         // remap classes
@@ -211,12 +209,8 @@ public class JarRemapper extends CustomRemapper {
                     }
                     out.putNextEntry(entry);
                     out.write(data);
-                } finally {
-                    is.close();
                 }
             }
-        } finally {
-            out.close();
         }
     }
 

src/main/java/net/md_5/specialsource/SpecialSource.java

@@ -278,9 +278,9 @@ public class SpecialSource {
             InheritanceMap inheritanceMap = new InheritanceMap();
 
             inheritanceMap.generate(inheritanceProviders, jarMapping.classes.values());
-            PrintWriter printWriter = new PrintWriter((File) options.valueOf("write-inheritance"));
+            try (PrintWriter printWriter = new PrintWriter((File) options.valueOf("write-inheritance"))) {
                 inheritanceMap.save(printWriter);
-            printWriter.close();
+            }
         }
 
         if (access != null) {
@@ -306,18 +306,10 @@ public class SpecialSource {
         JarComparer visitor2 = visitors.second;
 
         ClassReader clazz1, clazz2;
-        InputStream first = null;
-        InputStream second = null;
-        try {
-            clazz1 = new ClassReader(first = jars.second.getClass(classes.first));
-            clazz2 = new ClassReader(second = jars.first.getClass(classes.second));
-        } finally {
-            if (first != null) {
-                first.close();
-            }
-            if (second != null) {
-                second.close();
-            }
+        try (InputStream first = jars.second.getClass(classes.first);
+             InputStream second = jars.first.getClass(classes.second)) {
+            clazz1 = new ClassReader(first);
+            clazz2 = new ClassReader(second);
         }
         clazz1.accept(visitor1, 0);
         clazz2.accept(visitor2, 0);

src/main/java/net/md_5/specialsource/provider/ClassLoaderProvider.java

@@ -51,12 +51,12 @@ public class ClassLoaderProvider implements InheritanceProvider {
     public Collection<String> getParents(String owner) {
         // TODO: ToInternalName
         String ownerInternalName = owner.replace('.', '/').concat(".class");
-        InputStream input = classLoader.getResourceAsStream(ownerInternalName);
+
+        try (InputStream input = classLoader.getResourceAsStream(ownerInternalName)) {
             if (input == null) {
                 return null;
             }
 
-        try {
             ClassReader cr = new ClassReader(input);
             ClassNode node = new ClassNode();
             cr.accept(node, 0);
@@ -72,14 +72,6 @@ public class ClassLoaderProvider implements InheritanceProvider {
             return parents;
         } catch (Exception ex) {
             // Just ignore this, means that we couldn't get any lookup for the specified class
-        } finally {
-            if (input != null) {
-                try {
-                    input.close();
-                } catch (IOException ex) {
-                    // Too bad, can't recover from here
-                }
-            }
         }
 
         return null;

src/main/java/net/md_5/specialsource/transformer/MinecraftCodersPack.java

@@ -73,11 +73,8 @@ public class MinecraftCodersPack extends MappingTransformer {
     }
 
     private void readIntoMap(File file, Map<String, String> map) throws IOException {
-        FileReader fileReader = null;
-        CSVReader csvReader = null;
-        try {
-            fileReader = new FileReader(file);
-            csvReader = new CSVReader(fileReader);
+        try (FileReader fileReader = new FileReader(file);
+             CSVReader csvReader = new CSVReader(fileReader)) {
 
             String[] line;
             while ((line = csvReader.readNext()) != null) {
@@ -87,13 +84,6 @@ public class MinecraftCodersPack extends MappingTransformer {
                 Preconditions.checkArgument(line.length >= 2, "Invalid csv line: %s", (Object) line);
                 map.put(line[0], line[1]);
             }
-        } finally {
-            if (csvReader != null) {
-                csvReader.close();
-            }
-            if (fileReader != null) {
-                fileReader.close();
-            }
         }
     }
 

src/main/java/net/md_5/specialsource/util/FileLocator.java

@@ -64,20 +64,10 @@ public class FileLocator {
             System.out.println("Downloading " + url);
         }
 
-        ReadableByteChannel rbc = null;
-        FileOutputStream fos = null;
-        try {
         // TODO: Better solution for cleaning names - this extraneous '\' is introduced by path joining on the mcp dir
-            rbc = Channels.newChannel(new URL(url.replace('\\', '/')).openStream());
-            fos = new FileOutputStream(file);
+        try (ReadableByteChannel rbc = Channels.newChannel(new URL(url.replace('\\', '/')).openStream());
+             FileOutputStream fos = new FileOutputStream(file)) {
             fos.getChannel().transferFrom(rbc, 0, 1 << 24);
-        } finally {
-            if (rbc != null) {
-                rbc.close();
-            }
-            if (fos != null) {
-                fos.close();
-            }
         }
 
         // Success!

src/main/java/net/md_5/specialsource/writer/MappingWriter.java

@@ -57,18 +57,13 @@ public abstract class MappingWriter {
     public final void write(PrintWriter out) {
         // Sort lines for easy finding
         Collections.sort(lines);
-        // No try with resources for us!
-        try {
         // Format header
         out.println(MessageFormat.format(HEADER, oldJarName, newJarName, new Date()));
         // Write out lines
         for (String s : lines) {
             out.println(s);
         }
-        } finally {
-            // Make sure we close the outputstream in all cases
-            out.close();
-        }
+        // Caller is in charge of closes the output stream
     }
 
     protected final void addLine(String line) {