Automatic Language files update syncer for Galacticraft

ProcLang.java

package langs;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.nio.charset.Charset;
import java.nio.charset.MalformedInputException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class Proc
{
	private static String stringBOM = "";
	private static File langEnUS;
	private static int lastline;
	
	public static void main(String[] args)
	{
		System.out.println("hi");
		doMod("galacticraftcore");
		doMod("galacticraftmoon");
		doMod("galacticraftmars");
		doMod("galacticraftasteroids");
	}

	public static void doMod (String domain)
	{
		try
		{

			File langFolder = new File("/Users/radfast/Galacticraft/src/main/resources/assets/"+domain, "lang");
			if (!langFolder.exists())
			{
				System.out.println("No lang folder found, tried "+langFolder.getAbsolutePath());
				return;
			}

			List<File> languages = Arrays.asList(langFolder.listFiles());
			for (File lang:languages)
			{
				if ("en_US.lang".equals(lang.getName()))
				{	
					langEnUS = lang;
					break;
				}
			}
			for (File lang:languages)
			{
				if ("en_US.lang".equals(lang.getName())) continue;
				doFile(lang);
			}
		}
		catch (Exception e)
		{
			e.printStackTrace();
		}
	}
	
	public static void doFile (File lang)
	{
		String strLine;
		ArrayList<String> langLines = new ArrayList<String>();
		
		try
		{
			try
			{
		        System.out.println("Processing "+lang.getName());
				FileInputStream in = new FileInputStream(lang);
				BufferedReader br = new BufferedReader(new InputStreamReader(in, Charset.forName("UTF-8").newDecoder()));
	
				while((strLine = br.readLine())!= null)
				{
					langLines.add(strLine);
				}	        
				br.close();
			}
			catch(MalformedInputException ex)
			{
		        System.out.println("Re-reading without UTF-8: "+lang.getName());
				BufferedReader br = new BufferedReader(new FileReader(lang));
	
				while((strLine = br.readLine())!= null)
				{
					langLines.add(strLine);
				}	        
				br.close();		
			}

			FileInputStream inUS = new FileInputStream(langEnUS);
			BufferedReader brUS = new BufferedReader(new InputStreamReader(inUS));
			String prevLine = null;

			while((strLine = brUS.readLine())!= null)
			{
				if (strLine.startsWith(stringBOM)) strLine = strLine.substring(3, strLine.length());
				if (strLine.replace("\t", "").replace(" ", "").isEmpty()) continue;
				if (strLine.replace("\t", "").replace(" ", "").startsWith("#")) continue;
			
				int i = strLine.indexOf("=");
				if (i < 0)
				{
					System.out.println("---Strange line in en_US: ");
					System.out.println(strLine);
					continue;					
				}
				String searchLine = strLine.substring(0, i).replace(" ", "");
				
				if (scanFor(langLines, searchLine) > 0)
				{	
					prevLine = new String(searchLine);
					continue;
				}
				
				//The US key was not found in this lang file
				int line = prevLine == null ? 2 : scanFor(langLines, prevLine);
				if (line < 0)
				{
					line = lastline;
				}
				langLines.add(line, strLine+" ##NEEDS TRANSLATE##");
				prevLine = new String(searchLine);
			}

			brUS.close();
			
			BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(lang), Charset.forName("UTF-8").newEncoder()));
            for (int i = 0; i < langLines.size(); i++)
                writer.write(langLines.get(i) + "\n");
            writer.close();

		}
		catch(Exception e){
			System.out.println(e);
		}
	}
	
	public static int scanFor (ArrayList<String> lines, String target)
	{
		try
		{
			int line = 0;
			for (String strLine : lines)
			{
				line ++;
				if (strLine.startsWith(stringBOM)) strLine = strLine.substring(3, strLine.length());
				if (strLine.replace("\t", "").replace(" ", "").isEmpty()) continue;
				if (strLine.replace("\t", "").replace(" ", "").startsWith("#")) continue;
			
				int i = strLine.indexOf("=");
				if (i < 0)
				{
					System.out.println("---Strange line in other lang:");
					System.out.println(strLine);
					break;					
				}
				
				String strLine2 = strLine.substring(0, i).replace(" ", "");
				
				if (strLine2.equals(target))
				{	
					return line;
				}
				
				if (strLine2.equalsIgnoreCase(target))
				{
					System.out.println("---Case match problem---");
					System.out.println(strLine);
				}
			}

			lastline = line;
			return -1;
		}
		catch(Exception e){
			System.out.println(e);
			return -1;
		}
	}
}