diff --git a/core-buffer/include/FastH5Writer.hpp b/core-buffer/include/FastH5Writer.hpp
index 7b572fb..6db76f2 100644
--- a/core-buffer/include/FastH5Writer.hpp
+++ b/core-buffer/include/FastH5Writer.hpp
@@ -1,15 +1,28 @@
 #ifndef FASTH5WRITER_HPP
 #define FASTH5WRITER_HPP
 
+#include <cstdint>
 #include <vector>
 
 template <class B>
 class FastH5Writer {
+
+    const uint16_t CHUNKING_FACTOR = 1;
+
+    const size_t n_frames_per_file_;
+    const uint16_t y_frame_size_;
+    const uint16_t x_frame_size_;
+
+    std::string current_output_file_;
+    H5::DataSet current_image_dataset_;
+
+    void create_image_dataset();
+
 public:
     FastH5Writer(
-            const uint16_t n_frames_per_file,
-            const std::vector<uint16_t>& frame_size
-            );
+            const size_t n_frames_per_file,
+            const uint16_t y_frame_size,
+            const uint16_t x_frame_size);
 
     template <class T> void add_metadata(const std::string& metadata_name);
 
diff --git a/core-buffer/src/FastH5Writer.cpp b/core-buffer/src/FastH5Writer.cpp
new file mode 100644
index 0000000..0ffe01a
--- /dev/null
+++ b/core-buffer/src/FastH5Writer.cpp
@@ -0,0 +1,43 @@
+#include "FastH5Writer.hpp"
+#include <H5Cpp.h>
+
+template<>
+FastH5Writer<uint16_t>::FastH5Writer(
+        const size_t n_frames_per_file,
+        const uint16_t y_frame_size,
+        const uint16_t x_frame_size) :
+            n_frames_per_file_(n_frames_per_file),
+            y_frame_size_(y_frame_size),
+            x_frame_size_(y_frame_size)
+{
+//    // Each element in uint16_t has 2 bytes.
+//    size_t n_bytes = 2 * y_frame_size * x_frame_size;
+    auto file = H5::H5File(target_filename.c_str(), H5F_ACC_TRUNC);
+
+
+
+
+    create_dataset("image", frame_size, n_frames_per_file, "uint16");
+}
+
+template <class B>
+void FastH5Writer<B>::create_image_dataset()
+{
+    hsize_t dataset_dimension[3]  =
+            {n_frames_per_file_, y_frame_size_, x_frame_size_};
+    hsize_t max_dataset_dimension[3] =
+            {n_frames_per_file_, y_frame_size_, x_frame_size_};
+    H5::DataSpace dataspace(
+            3, dataset_dimension, max_dataset_dimension);
+
+    hsize_t dataset_chunking[3] =
+            {CHUNKING_FACTOR, y_frame_size_, x_frame_size_};
+    H5::DSetCreatPropList dataset_properties;
+    dataset_properties.setChunk(3, dataset_chunking);
+
+    H5::AtomType dataset_data_type(H5::PredType::NATIVE_UINT16);
+    dataset_data_type.setOrder(H5T_ORDER_LE);
+
+    current_image_dataset_ = current_output_file_.createDataSet(
+            "image", dataset_data_type, dataspace, dataset_properties);
+}
\ No newline at end of file