diff --git a/.gitignore b/.gitignore
index c274f41..132bd16 100644
--- a/.gitignore
+++ b/.gitignore
@@ -50,3 +50,4 @@ build-iPhoneSimulator/
 .rvmrc
 /site/public
 /.byebug_history
+/.idea
diff --git a/.ruby-gemset b/.ruby-gemset
new file mode 100644
index 0000000..b5f802f
--- /dev/null
+++ b/.ruby-gemset
@@ -0,0 +1 @@
+copper
\ No newline at end of file
diff --git a/.ruby-version b/.ruby-version
new file mode 100644
index 0000000..6bf7c6f
--- /dev/null
+++ b/.ruby-version
@@ -0,0 +1 @@
+ruby-2.5.1
diff --git a/Gemfile.lock b/Gemfile.lock
index 5bb2c82..21ef7d2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    c66-copper (0.0.3)
+    c66-copper (0.0.4)
       colorize (~> 0.8)
       ipaddress (~> 0.8)
       json (~> 1.4)
@@ -17,8 +17,8 @@ GEM
     colorize (0.8.1)
     ffi (1.9.23)
     ipaddress (0.8.3)
-    json (1.8.3)
-    jsonpath (0.8.11)
+    json (1.8.6)
+    jsonpath (0.9.4)
       multi_json
       to_regexp (~> 0.2.1)
     listen (3.1.5)
@@ -37,7 +37,7 @@ GEM
     semantic (1.6.1)
     thor (0.20.0)
     to_regexp (0.2.1)
-    treetop (1.6.9)
+    treetop (1.6.10)
       polyglot (~> 0.3)
 
 PLATFORMS
@@ -51,4 +51,4 @@ DEPENDENCIES
   rerun (~> 0.13)
 
 BUNDLED WITH
-   1.16.1
+   1.16.4
diff --git a/a.yaml b/a.yaml
new file mode 100644
index 0000000..2d3b967
--- /dev/null
+++ b/a.yaml
@@ -0,0 +1,2 @@
+a:
+  b: "c"
\ No newline at end of file
diff --git a/b.rule b/b.rule
new file mode 100644
index 0000000..bdfb8a3
--- /dev/null
+++ b/b.rule
@@ -0,0 +1,3 @@
+rule abc warn {
+    fetch("") -> console
+}
\ No newline at end of file
diff --git a/bin/copper b/bin/copper
index 28e7e5c..b149e21 100755
--- a/bin/copper
+++ b/bin/copper
@@ -36,23 +36,40 @@ module Copper
 			require 'byebug' if $debug
 
 			rule_file = options[:rules]
+			if !rule_file
+				puts "No rule file provided. Use --rule option".red
+				exit(1)
+			end
+
 			unless File.exists?(rule_file)
 				puts "Rule file #{rule_file} not found".red
 				exit(1)
 			end
 			content_file = options[:file]
+			if !content_file
+				puts "No config file provided. Use --file option".red
+				exit(1)
+			end
+
 			unless File.exists?(content_file)
 				puts "Config file #{content_file} not found".red
 				exit(1)
 			end
 
 			rules = File.read(rule_file)
-			file = ""
+			if rules.empty?
+				puts "Empty rules file".red
+				exit(2)
+			end
 			raise ::NotImplementedError if options[:format] != 'yaml'
 			# load the yaml file and split them into separate yamls
 
 			failed = false
 			content = File.read(content_file)
+			if content.empty?
+				puts "Empty config file".red
+				exit(2)
+			end
 			content.split('---').each_with_index do |part, idx|
 				puts "Validating part #{idx}"
 				file = YAML::load(part)
diff --git a/lib/copper/version.rb b/lib/copper/version.rb
index c5e2302..2cb2b33 100644
--- a/lib/copper/version.rb
+++ b/lib/copper/version.rb
@@ -1,5 +1,5 @@
 module Copper
-	VERSION = '0.0.4'
+	VERSION = '0.0.5'
 	COPYRIGHT_MESSAGE = "(c) 2018 Cloud66 Inc."
 	APP_NAME = 'Copper'
 end