diff --git a/concordia/CMakeLists.txt b/concordia/CMakeLists.txt
index 68e6e3d..384eeff 100644
--- a/concordia/CMakeLists.txt
+++ b/concordia/CMakeLists.txt
@@ -6,6 +6,7 @@ foreach(dir ${ALL_DIRECTORIES})
 endforeach(dir)
 
 add_library(concordia SHARED
+  concordia_index.cpp
   word_map.cpp
   hash_generator.cpp
   concordia.cpp
diff --git a/concordia/concordia_index.cpp b/concordia/concordia_index.cpp
new file mode 100644
index 0000000..62dfd28
--- /dev/null
+++ b/concordia/concordia_index.cpp
@@ -0,0 +1,40 @@
+#include "concordia/concordia_index.hpp"
+
+#include <boost/filesystem.hpp>
+
+ConcordiaIndex::ConcordiaIndex(const string & wordMapFilepath,
+                            const string & hashedIndexFilepath,
+                            const string & suffixArrayFilepath)
+                                         throw(ConcordiaException) {
+    if (boost::filesystem::exists(wordMapFilepath)) {
+        if (boost::filesystem::exists(hashedIndexFilepath)) {
+            // create hashed index file for appending
+        } else {
+            throw ConcordiaException("E01: Word map file exists "
+                                     "but hashed index file absent.");
+        }
+    } else {       // WordMap file does not exist
+        if (boost::filesystem::exists(hashedIndexFilepath)) {
+            throw ConcordiaException("E02: Hashed index file exists "
+                                     "but word map file absent.");
+        } else {
+            // create hashed index file for writing
+        }
+    }
+    _hashGenerator = boost::shared_ptr<HashGenerator>(
+                                    new HashGenerator(wordMapFilepath));
+}
+
+ConcordiaIndex::~ConcordiaIndex() {
+}
+
+void ConcordiaIndex::serializeWordMap() {
+    _hashGenerator->serializeWordMap();
+}
+
+void ConcordiaIndex::generateSuffixArray() {
+}
+
+void ConcordiaIndex::addSentence(const string & sentence) {
+}
+
diff --git a/concordia/concordia_index.hpp b/concordia/concordia_index.hpp
new file mode 100644
index 0000000..c55f473
--- /dev/null
+++ b/concordia/concordia_index.hpp
@@ -0,0 +1,36 @@
+#ifndef CONCORDIA_INDEX_HDR
+#define CONCORDIA_INDEX_HDR
+
+#include <boost/shared_ptr.hpp>
+#include "concordia/hash_generator.hpp"
+#include "concordia/concordia_exception.hpp"
+
+/*!
+  Class for creating and maintaining the index.
+
+*/
+
+using namespace std;
+
+class ConcordiaIndex {
+public:
+    explicit ConcordiaIndex(const string & wordMapFilepath,
+                            const string & hashedIndexFilepath,
+                            const string & suffixArrayFilepath)
+                                    throw(ConcordiaException);
+
+    /*! Destructor.
+    */
+    virtual ~ConcordiaIndex();
+
+    void addSentence(const string & sentence);
+
+    void serializeWordMap();
+
+    void generateSuffixArray();
+
+private:
+    boost::shared_ptr<HashGenerator> _hashGenerator;
+};
+
+#endif
diff --git a/concordia/hash_generator.cpp b/concordia/hash_generator.cpp
index 79f734a..0a0c2fd 100644
--- a/concordia/hash_generator.cpp
+++ b/concordia/hash_generator.cpp
@@ -5,12 +5,12 @@
 #include <boost/algorithm/string.hpp>
 #include <fstream>
 
-HashGenerator::HashGenerator(const string & wordMapFilename)
+HashGenerator::HashGenerator(const string & wordMapFilePath)
                                          throw(ConcordiaException) :
-    _wordMapFilename(wordMapFilename),
+    _wordMapFilePath(wordMapFilePath),
     _wordMap(boost::shared_ptr<WordMap>(new WordMap)) {
-    if (boost::filesystem::exists(_wordMapFilename)) {
-        ifstream ifs(_wordMapFilename.c_str(), std::ios::binary);
+    if (boost::filesystem::exists(_wordMapFilePath)) {
+        ifstream ifs(_wordMapFilePath.c_str(), std::ios::binary);
         boost::archive::binary_iarchive ia(ifs);
         boost::shared_ptr<WordMap> restoredWordMap(new WordMap);
         ia >> *_wordMap;
@@ -36,7 +36,7 @@ vector<int> HashGenerator::generateHash(const string & sentence) {
 }
 
 void HashGenerator::serializeWordMap() {
-    ofstream ofs(_wordMapFilename.c_str(), std::ios::binary);
+    ofstream ofs(_wordMapFilePath.c_str(), std::ios::binary);
     boost::archive::binary_oarchive oa(ofs);
     oa << *_wordMap;
 }
diff --git a/concordia/hash_generator.hpp b/concordia/hash_generator.hpp
index 15da5dd..5c1f101 100644
--- a/concordia/hash_generator.hpp
+++ b/concordia/hash_generator.hpp
@@ -17,7 +17,7 @@ using namespace std;
 
 class HashGenerator {
 public:
-    explicit HashGenerator(const string & wordMapFilename)
+    explicit HashGenerator(const string & wordMapFilePath)
                                     throw(ConcordiaException);
 
     /*! Destructor.
@@ -31,7 +31,7 @@ public:
 private:
     boost::shared_ptr<WordMap> _wordMap;
 
-    string _wordMapFilename;
+    string _wordMapFilePath;
 };
 
 #endif
diff --git a/concordia/t/CMakeLists.txt b/concordia/t/CMakeLists.txt
index 74176fd..04da115 100644
--- a/concordia/t/CMakeLists.txt
+++ b/concordia/t/CMakeLists.txt
@@ -3,6 +3,7 @@ add_library(concordia-tests
   test_concordia_config.cpp
   test_word_map.cpp
   test_hash_generator.cpp
+  test_concordia_index.cpp
   )
 
 target_link_libraries(concordia-tests concordia ${LIBCONFIG_LIB} concordia-tests-common)
diff --git a/concordia/t/test_concordia_index.cpp b/concordia/t/test_concordia_index.cpp
new file mode 100644
index 0000000..fa2355a
--- /dev/null
+++ b/concordia/t/test_concordia_index.cpp
@@ -0,0 +1,18 @@
+#include "tests/unit-tests/unit_tests_globals.hpp"
+
+#include "concordia/concordia_index.hpp"
+#include "tests/common/test_resources_manager.hpp"
+
+using namespace std;
+
+BOOST_AUTO_TEST_SUITE(concordia_index)
+
+BOOST_AUTO_TEST_CASE( ResourcesExistenceTest1 )
+{
+    ConcordiaIndex index(TestResourcesManager::getTestWordMapFilePath("mock_word_map.bin"),
+                         TestResourcesManager::getTestHashIndexFilePath("mock_hash_index.bin"),
+                         TestResourcesManager::getTestSuffixArrayFilePath());
+                         
+}
+
+BOOST_AUTO_TEST_SUITE_END()
diff --git a/tests/common/test_resources_manager.cpp b/tests/common/test_resources_manager.cpp
index 46c5c4e..c6b6f32 100644
--- a/tests/common/test_resources_manager.cpp
+++ b/tests/common/test_resources_manager.cpp
@@ -3,6 +3,7 @@
 #define PUDDLE_TEST_DIRECTORY "puddle"
 #define CONCORDIA_TAGSET_DIRECTORY "concordia-tagset"
 #define CONCORDIA_CONFIG_DIRECTORY "concordia-config"
+#define CONCORDIA_INDEX_DIRECTORY "concordia-index"
 
 string TestResourcesManager::getPuddleFilePath(const string & filename) {
     string result = string(TEST_RESOURCES_DIRECTORY);
@@ -15,6 +16,21 @@ string TestResourcesManager::getTestConcordiaConfigFilePath(const string & filen
     return result + "/" + CONCORDIA_CONFIG_DIRECTORY + "/" + filename;
 }
 
+string TestResourcesManager::getTestWordMapFilePath(const string & filename) {
+    string result = string(TEST_RESOURCES_DIRECTORY);
+    return result + "/" + CONCORDIA_INDEX_DIRECTORY + "/" + filename;
+}
+
+string TestResourcesManager::getTestHashIndexFilePath(const string & filename) {
+    string result = string(TEST_RESOURCES_DIRECTORY);
+    return result + "/" + CONCORDIA_INDEX_DIRECTORY + "/" + filename;
+}
+
+string TestResourcesManager::getTestSuffixArrayFilePath() {
+    string result = string(TEST_RESOURCES_DIRECTORY);
+    return result + "/" + CONCORDIA_INDEX_DIRECTORY + "/test_SA.bin";
+}
+
 string TestResourcesManager::getProdConcordiaConfigFilePath(const string & filename) {
     string result = string(PROD_RESOURCES_DIRECTORY);
     return result + "/" + CONCORDIA_CONFIG_DIRECTORY + "/" + filename;
diff --git a/tests/common/test_resources_manager.hpp b/tests/common/test_resources_manager.hpp
index 607f966..846647d 100644
--- a/tests/common/test_resources_manager.hpp
+++ b/tests/common/test_resources_manager.hpp
@@ -14,6 +14,12 @@ public:
 
     static string getTestConcordiaConfigFilePath(const string & filename);
 
+    static string getTestWordMapFilePath(const string & filename);
+
+    static string getTestHashIndexFilePath(const string & filename);
+
+    static string getTestSuffixArrayFilePath();
+
 	static string getProdConcordiaConfigFilePath(const string & filename);
 };
 
diff --git a/tests/resources/concordia-index/mock_hash_index.bin b/tests/resources/concordia-index/mock_hash_index.bin
new file mode 100644
index 0000000..e69de29
diff --git a/tests/resources/concordia-index/mock_word_map.bin b/tests/resources/concordia-index/mock_word_map.bin
new file mode 100644
index 0000000..3da4c04
Binary files /dev/null and b/tests/resources/concordia-index/mock_word_map.bin differ