diff --git a/DataChecker.py b/DataChecker.py
index 4a15e0f..00f0749 100644
--- a/DataChecker.py
+++ b/DataChecker.py
@@ -1,34 +1,51 @@
-import os, json
+"""DataChecker.py
 
-def main():
-  # Directory to read data files from.
-  DATA_DIR = "./CobblemonData/"
+Used to check possible errors in data files.
+"""
 
-  # Gets and sorts directory.
-  sortedDirectory = sorted(os.listdir(DATA_DIR))
+import os
+import sys
+import json
+
+
+# Directory to read data files from.
+DATA_DIR = "./CobblemonData/"
 
-  # All of the possible conditions in pData["spawns"]["conditions"]
-  possible_conditions = ["dimensions", "biomes", "moonPhase", "canSeeSky", "minX", "minY", "minZ", "maxX",
-                         "maxY", "maxZ", "minLight", "maxLight", "timeRange", "isRaining", "isThundering",
-                         "minWidth", "maxWidth", "minHeight", "maxHeight", "neededNearbyBlocks",
-                         "neededBaseBlocks", "minDepth", "maxDepth", "fluidIsSource", "fluidBlock"]
 
-  # For every fileName in directory.
-  for fileName in sortedDirectory:
-    pFile = open(DATA_DIR + fileName, "r")
+def main():
+  error_count = 0
+
+  # Gets and sorts directory.
+  sorted_directory = sorted(os.listdir(DATA_DIR))
+
+  # All of the possible conditions in p_data["spawns"]["conditions"]
+  possible_conditions = ["dimensions", "biomes", "structures", "moonPhase",
+                         "canSeeSky", "minX", "minY", "minZ", "maxX", "maxY",
+                         "maxZ", "minLight", "maxLight", "timeRange",
+                         "isRaining", "isThundering", "minWidth", "maxWidth",
+                         "minHeight", "maxHeight", "neededNearbyBlocks",
+                         "neededBaseBlocks", "minDepth", "maxDepth",
+                         "fluidIsSource", "fluidBlock"]
+
+  # For every file_name in directory.
+  for file_name in sorted_directory:
+    p_file = open(DATA_DIR + file_name, mode = "r", encoding = "utf-8")
     # Obtain json data.
-    pData = json.load(pFile)
+    p_data = json.load(p_file)
 
     # For every condition in possible_conditions.
     for condition in possible_conditions:
-      # If condition is outside of pData["spawns"]["conditions"].
-      if (condition in pData["spawns"][0]):
+      # If condition is outside of p_data["spawns"]["conditions"].
+      if condition in p_data["spawns"][0]:
         # Print error with file name and condition.
-        print(f"ERROR: {fileName}: {condition} outside of condition.")
+        print(f"ERROR: {file_name}: {condition} outside of condition.")
+        error_count += 1
 
     # Close file.
-    pFile.close()
-    exit()
+    p_file.close()
+
+    print(f"Finished with {error_count} possible errors.")
+    sys.exit()
 
 
 if __name__ == "__main__":