Refactor Parser

File.java

@@ -0,0 +1,26 @@
+import java.io.IOException;
+
+public interface File {
+    /**
+     * Get content of the file as string.
+     * 
+     * @param ignoreUnicodeCharacters
+     *            ignore Unicode characters
+     * @return File content as a string.
+     * @throws IOException
+     *             if the file not exists or an I/O error occurs.
+     */
+    String getContent(boolean ignoreUnicodeCharacters) throws IOException;
+
+    /**
+     * Write content to file.
+     * 
+     * @param content
+     *            content to be written.
+     * @throws IOException
+     *             if the file exists but is a directory rather than a regular
+     *             file, does not exist but cannot be created, or cannot be
+     *             opened for any other reason or an I/O error occurs.
+     */
+    void saveContent(String content) throws IOException;
+}

FileImpl.java

@@ -0,0 +1,36 @@
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+
+public final class FileImpl implements File {
+    private static final int UNICODE_CHAR_LIMIT = 0x80;
+    private final java.io.File file;
+
+    public FileImpl(java.io.File file) {
+        this.file = file;
+    }
+
+    @Override
+    public String getContent(boolean ignoreUnicodeCharacters) throws IOException {
+        try (FileInputStream fileInputStream = new FileInputStream(file)) {
+            StringBuilder output = new StringBuilder();
+            int data;
+            while ((data = fileInputStream.read()) > 0) {
+                if (ignoreUnicodeCharacters && data < UNICODE_CHAR_LIMIT) {
+                    output.append((char) data);
+                }
+            }
+            return output.toString();
+        }
+    }
+
+    @Override
+    public void saveContent(String content) throws IOException {
+        try (FileOutputStream fileOutputStream = new FileOutputStream(file)) {
+            for (int i = 0; i < content.length(); i += 1) {
+                fileOutputStream.write(content.charAt(i));
+            }
+        }
+    }
+
+}