Clean up MarkdownFile Kotlin implementation

app/src/main/java/com/wbrawner/simplemarkdown/model/MarkdownFile.kt

@@ -1,61 +1,34 @@
 package com.wbrawner.simplemarkdown.model
 
-import com.wbrawner.simplemarkdown.utility.ErrorHandler
-import com.wbrawner.simplemarkdown.utility.Utils
-import java.io.*
+import java.io.InputStream
+import java.io.OutputStream
+import java.io.Reader
 
 /**
  * This class serves as a wrapper to manage the manage the file input and output operations, as well
  * as to keep track of the data itself in memory.
  */
-class MarkdownFile {
-    var name: String? = null
-    var content: String? = null
-    private val errorHandler: ErrorHandler
+class MarkdownFile(var name: String = "Untitled.md", var content: String = "") {
 
-    constructor(errorHandler: ErrorHandler, name: String, content: String) {
-        this.errorHandler = errorHandler
+    fun load(name: String, inputStream: InputStream): Boolean {
         this.name = name
-        this.content = content
-    }
-
-
-    constructor(errorHandler: ErrorHandler) {
-        this.errorHandler = errorHandler
-        this.name = "Untitled.md"
-        this.content = ""
-    }
-
-    fun load(name: String, `in`: InputStream): Boolean {
-        val sb = StringBuilder()
-        var reader: BufferedReader? = null
-        try {
-            reader = BufferedReader(InputStreamReader(`in`))
-            var line: String
-            while ((line = reader.readLine()) != null) {
-                sb.append(line).append('\n')
-            }
-            this.name = name
-            this.content = sb.toString()
-            return true
-        } catch (ignored: IOException) {
-            return false
-        } finally {
-            Utils.closeQuietly(reader)
+        return try {
+            this.content = inputStream.reader().use(Reader::readText)
+            true
+        } catch (e: Throwable) {
+            false
         }
     }
 
     fun save(name: String, outputStream: OutputStream): Boolean {
-        var writer: OutputStreamWriter? = null
-        try {
-            writer = OutputStreamWriter(outputStream)
-            writer.write(this.content)
-            this.name = name
-        } catch (ignored: IOException) {
-            return false
-        } finally {
-            Utils.closeQuietly(writer)
+        this.name = name
+        return try {
+            outputStream.writer().use {
+                it.write(this.content)
+            }
+            true
+        } catch (e: Throwable) {
+            false
         }
-        return true
     }
 }