Make sure file handles are closed immediately

source/net/filebot/format/ExpressionFormatFunctions.java

@@ -1,7 +1,6 @@
 package net.filebot.format;
 
 import static java.util.stream.Collectors.*;
-import static net.filebot.util.FileUtilities.*;
 import static net.filebot.util.RegularExpressions.*;
 
 import java.io.File;
@@ -15,6 +14,7 @@ import java.util.stream.Stream;
 
 import groovy.lang.Closure;
 import groovy.util.XmlSlurper;
+import net.filebot.util.FileUtilities;
 
 /**
  * Global functions available in the {@link ExpressionFormat}
@@ -57,7 +57,7 @@ public class ExpressionFormatFunctions {
 	public static Map<String, String> csv(String path) throws IOException {
 		Pattern[] delimiter = { TAB, SEMICOLON };
 		Map<String, String> map = new LinkedHashMap<String, String>();
-		streamLines(new File(path)).forEach(line -> {
+		for (String line : readLines(path)) {
 			for (Pattern d : delimiter) {
 				String[] field = d.split(line, 2);
 				if (field.length >= 2) {
@@ -65,12 +65,12 @@ public class ExpressionFormatFunctions {
 					break;
 				}
 			}
-		});
+		}
 		return map;
 	}
 
 	public static List<String> readLines(String path) throws IOException {
-		return streamLines(new File(path)).collect(toList());
+		return FileUtilities.readLines(new File(path));
 	}
 
 	public static Object readXml(String path) throws Exception {

source/net/filebot/util/FileSet.java

@@ -158,13 +158,13 @@ public class FileSet extends AbstractSet<Path> {
 	}
 
 	public void load(File f) throws IOException {
-		streamLines(f).forEach(path -> {
+		for (String path : readLines(f)) {
 			try {
 				add(Paths.get(path));
 			} catch (InvalidPathException e) {
 				debug.warning(e::toString);
 			}
-		});
+		}
 	}
 
 	public void append(File f, Collection<?>... paths) throws IOException {

source/net/filebot/util/FileUtilities.java

@@ -43,10 +43,8 @@ import java.util.Map;
 import java.util.SortedMap;
 import java.util.TreeMap;
 import java.util.TreeSet;
-import java.util.logging.Level;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
-import java.util.stream.Stream;
 
 import org.apache.commons.io.FileUtils;
 
@@ -193,19 +191,14 @@ public final class FileUtilities {
 		return Files.readAllBytes(source.toPath());
 	}
 
-	public static Stream<String> streamLines(File file) throws IOException {
-		BufferedReader reader = new BufferedReader(new UnicodeReader(new BufferedInputStream(new FileInputStream(file)), false, UTF_8), BUFFER_SIZE);
-		return reader.lines().onClose(() -> {
-			try {
-				reader.close();
-			} catch (Exception e) {
-				debug.log(Level.SEVERE, "Failed to close file: " + file, e);
+	public static List<String> readLines(File file) throws IOException {
+		try (BufferedReader reader = new BufferedReader(new UnicodeReader(new BufferedInputStream(new FileInputStream(file), BUFFER_SIZE), false, UTF_8), BUFFER_SIZE)) {
+			return reader.lines().collect(toList());
 		}
-		});
 	}
 
 	public static String readTextFile(File file) throws IOException {
-		return streamLines(file).collect(joining(System.lineSeparator()));
+		return String.join(System.lineSeparator(), readLines(file));
 	}
 
 	public static File writeFile(ByteBuffer data, File destination) throws IOException {