Build first maven project

- added maven wrapper
- added kst4contest package
- moved tests to src/test/main and added @Test as first step
- moved resources to src/main/resource

pmd-ruleset.xml

@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<ruleset name="Custom Java Ruleset"
+         xmlns="http://pmd.sourceforge.net/ruleset/2.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://pmd.sourceforge.net/ruleset/2.0.0 http://pmd.sourceforge.net/ruleset_2_0_0.xsd">
+
+    <description>
+        Custom ruleset for Java
+    </description>
+
+    <rule ref="category/java/bestpractices.xml">
+        <!-- System.println is ok in simple Console App -->
+        <exclude name="SystemPrintln" />
+    </rule>
+
+    <rule ref="category/java/codestyle.xml" />
+
+    <rule ref="category/java/design.xml" />
+    <rule ref="category/java/design.xml/LoosePackageCoupling">
+        <properties>
+            <property name="packages" value="de.kneitzel" />
+            <!-- <property name="classes" value="" /> -->
+        </properties>
+    </rule>
+
+    <rule ref="category/java/documentation.xml" />
+
+    <rule ref="category/java/errorprone.xml" />
+
+    <rule ref="category/java/multithreading.xml" />
+
+    <rule ref="category/java/performance.xml" />
+
+    <rule ref="category/java/security.xml" />
+
+</ruleset>