Added image utility class with a method for creating a temp image file.

app/src/main/java/com/aluxoft/earrecognition/utils/ImageUtils.java

+package com.aluxoft.earrecognition.utils;
+
+import android.os.Environment;
+
+import java.io.File;
+import java.io.IOException;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+/**
+ * Created by josejuliomartinez on 08/10/15.
+ */
+public class ImageUtils {
+
+    public static File createTempImageFile() throws IOException {
+        String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
+        String imageFileName = "JPEG_" + timeStamp + "_";
+        File storageDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
+        return File.createTempFile(imageFileName, /* prefix */
+                ".jpg", /* suffix */
+                storageDir /* directory */
+        );
+    }
+
+    private ImageUtils() {
+
+    }
+
+}