io: Added IO helper class.

Contains static helper method to close Closable objects.

src/main/java/com/owncloud/android/utils/IOHelper.java

@@ -0,0 +1,24 @@
+package com.owncloud.android.utils;
+
+import com.owncloud.android.lib.common.utils.Log_OC;
+
+import java.io.Closeable;
+import java.io.IOException;
+
+/**
+ * Static system IO helper methods
+ */
+
+public class IOHelper {
+    private static final String TAG = IOHelper.class.getSimpleName();
+
+    public static void close(Closeable c) {
+        if (c == null) return;
+        try {
+            c.close();
+        } catch (IOException e) {
+            Log_OC.e(TAG, "Error closing stream", e);
+        }
+    }
+
+}