diff --git a/common/Android.mk b/common/Android.mk
new file mode 100644
index 0000000..99aed4c
--- /dev/null
+++ b/common/Android.mk
@@ -0,0 +1,26 @@
+# Copyright (C) 2014 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+LOCAL_PATH:= $(call my-dir)
+include $(CLEAR_VARS)
+LOCAL_SRC_FILES := $(call all-java-files-under, src)
+LOCAL_MODULE := latinime-common
+LOCAL_SDK_VERSION := 21
+include $(BUILD_STATIC_JAVA_LIBRARY)
+
+# Also build a host side library
+include $(CLEAR_VARS)
+LOCAL_MODULE := latinime-common-host
+LOCAL_SRC_FILES := $(call all-java-files-under, src)
+include $(BUILD_HOST_JAVA_LIBRARY)
diff --git a/common/src/com/android/inputmethod/latin/dictutils/CodePointUtils.java b/common/src/com/android/inputmethod/latin/dictutils/CodePointUtils.java
new file mode 100644
index 0000000..38aba7b
--- /dev/null
+++ b/common/src/com/android/inputmethod/latin/dictutils/CodePointUtils.java
@@ -0,0 +1,101 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.inputmethod.latin.common;
+
+import java.util.Random;
+
+// Utility methods related with code points used for tests.
+public class CodePointUtils {
+    private CodePointUtils() {
+        // This utility class is not publicly instantiable.
+    }
+
+    public static final int[] LATIN_ALPHABETS_LOWER = {
+        'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
+        'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
+        0x00E0 /* LATIN SMALL LETTER A WITH GRAVE */,
+        0x00E1 /* LATIN SMALL LETTER A WITH ACUTE */,
+        0x00E2 /* LATIN SMALL LETTER A WITH CIRCUMFLEX */,
+        0x00E3 /* LATIN SMALL LETTER A WITH TILDE */,
+        0x00E4 /* LATIN SMALL LETTER A WITH DIAERESIS */,
+        0x00E5 /* LATIN SMALL LETTER A WITH RING ABOVE */,
+        0x00E6 /* LATIN SMALL LETTER AE */,
+        0x00E7 /* LATIN SMALL LETTER C WITH CEDILLA */,
+        0x00E8 /* LATIN SMALL LETTER E WITH GRAVE */,
+        0x00E9 /* LATIN SMALL LETTER E WITH ACUTE */,
+        0x00EA /* LATIN SMALL LETTER E WITH CIRCUMFLEX */,
+        0x00EB /* LATIN SMALL LETTER E WITH DIAERESIS */,
+        0x00EC /* LATIN SMALL LETTER I WITH GRAVE */,
+        0x00ED /* LATIN SMALL LETTER I WITH ACUTE */,
+        0x00EE /* LATIN SMALL LETTER I WITH CIRCUMFLEX */,
+        0x00EF /* LATIN SMALL LETTER I WITH DIAERESIS */,
+        0x00F0 /* LATIN SMALL LETTER ETH */,
+        0x00F1 /* LATIN SMALL LETTER N WITH TILDE */,
+        0x00F2 /* LATIN SMALL LETTER O WITH GRAVE */,
+        0x00F3 /* LATIN SMALL LETTER O WITH ACUTE */,
+        0x00F4 /* LATIN SMALL LETTER O WITH CIRCUMFLEX */,
+        0x00F5 /* LATIN SMALL LETTER O WITH TILDE */,
+        0x00F6 /* LATIN SMALL LETTER O WITH DIAERESIS */,
+        0x00F7 /* LATIN SMALL LETTER O WITH STROKE */,
+        0x00F9 /* LATIN SMALL LETTER U WITH GRAVE */,
+        0x00FA /* LATIN SMALL LETTER U WITH ACUTE */,
+        0x00FB /* LATIN SMALL LETTER U WITH CIRCUMFLEX */,
+        0x00FC /* LATIN SMALL LETTER U WITH DIAERESIS */,
+        0x00FD /* LATIN SMALL LETTER Y WITH ACUTE */,
+        0x00FE /* LATIN SMALL LETTER THORN */,
+        0x00FF /* LATIN SMALL LETTER Y WITH DIAERESIS */
+    };
+
+    public static int[] generateCodePointSet(final int codePointSetSize, final Random random) {
+        final int[] codePointSet = new int[codePointSetSize];
+        for (int i = codePointSet.length - 1; i >= 0; ) {
+            final int r = Math.abs(random.nextInt());
+            if (r < 0) continue;
+            // Don't insert 0~0x20, but insert any other code point.
+            // Code points are in the range 0~0x10FFFF.
+            final int candidateCodePoint = 0x20 + r % (Character.MAX_CODE_POINT - 0x20);
+            // Code points between MIN_ and MAX_SURROGATE are not valid on their own.
+            if (candidateCodePoint >= Character.MIN_SURROGATE
+                    && candidateCodePoint <= Character.MAX_SURROGATE) continue;
+            codePointSet[i] = candidateCodePoint;
+            --i;
+        }
+        return codePointSet;
+    }
+
+    /**
+     * Generates a random word.
+     */
+    public static String generateWord(final Random random, final int[] codePointSet) {
+        StringBuilder builder = new StringBuilder();
+        // 8 * 4 = 32 chars max, but we do it the following way so as to bias the random toward
+        // longer words. This should be closer to natural language, and more importantly, it will
+        // exercise the algorithms in dicttool much more.
+        final int count = 1 + (Math.abs(random.nextInt()) % 5)
+                + (Math.abs(random.nextInt()) % 5)
+                + (Math.abs(random.nextInt()) % 5)
+                + (Math.abs(random.nextInt()) % 5)
+                + (Math.abs(random.nextInt()) % 5)
+                + (Math.abs(random.nextInt()) % 5)
+                + (Math.abs(random.nextInt()) % 5)
+                + (Math.abs(random.nextInt()) % 5);
+        while (builder.length() < count) {
+            builder.appendCodePoint(codePointSet[Math.abs(random.nextInt()) % codePointSet.length]);
+        }
+        return builder.toString();
+    }
+}