close streams in IOUtils

app/src/main/java/ru/vtosters/lite/utils/IOUtils.java

@@ -26,7 +26,10 @@ public class IOUtils {
 
     public static byte[] decodeStream(InputStream encIs, String keyURL) throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidAlgorithmParameterException, InvalidKeyException, IOException {
         CipherInputStream cip = new CipherInputStream(encIs, getCipher(keyURL));
-        return readAllBytes(cip);
+        var bytes = readAllBytes(cip);
+        cip.close();
+
+        return bytes;
     }
 
     public static Cipher getCipher(String key) throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidAlgorithmParameterException, InvalidKeyException {
@@ -46,7 +49,11 @@ public class IOUtils {
     }
 
     public static String readAllLines(File file) throws IOException {
-        return readAllLines(new FileInputStream(file));
+        var is = new FileInputStream(file);
+        var bytes = readAllBytes(is);
+        is.close();
+
+        return new String(bytes, StandardCharsets.UTF_8);
     }
 
     public static String readAllLines(InputStream is) throws IOException {
@@ -54,7 +61,11 @@ public class IOUtils {
     }
 
     public static byte[] readAllBytes(File file) throws IOException {
-        return readAllBytes(new FileInputStream(file));
+        var is = new FileInputStream(file);
+        var bytes = readAllBytes(is);
+        is.close();
+
+        return bytes;
     }
 
     public static byte[] readAllBytes(InputStream is) throws IOException {
@@ -63,7 +74,11 @@ public class IOUtils {
         int len;
         while ((len = is.read(buffer)) > 0)
             bos.write(buffer, 0, len);
-        return bos.toByteArray();
+
+        var bytes = bos.toByteArray();
+        bos.close();
+
+        return bytes;
     }
 
     public static void writeToFile(File file, String content) throws IOException {
@@ -73,6 +88,7 @@ public class IOUtils {
     public static void writeToFile(File file, byte[] content) throws IOException {
         FileOutputStream fos = new FileOutputStream(file);
         fos.write(content);
+        fos.close();
     }
 
     public static void deleteRecursive(File f) {