title: Exception in thread "main" java.lang.RuntimeException: Error starting org.neo4j.kernel.EmbeddedGraphDatabase, C:\Neo4jCommunity
body: <p>I'm facing a problem which blocks me. I work on a project with Neo4j Database Graphs.
      My problem is when i run java application, it displays me in console : </p>
  
  <pre><code>Exception in thread "main" java.lang.RuntimeException: Error starting org.neo4j.kernel.EmbeddedGraphDatabase, C:\Neo4jCommunity
      at org.neo4j.kernel.InternalAbstractGraphDatabase.run(InternalAbstractGraphDatabase.java:358)
      at org.neo4j.kernel.EmbeddedGraphDatabase.&lt;init&gt;(EmbeddedGraphDatabase.java:59)
      at org.neo4j.graphdb.factory.GraphDatabaseFactory$1.newDatabase(GraphDatabaseFactory.java:90)
      at org.neo4j.graphdb.factory.GraphDatabaseBuilder.newGraphDatabase(GraphDatabaseBuilder.java:199)
      at org.neo4j.graphdb.factory.GraphDatabaseFactory.newEmbeddedDatabase(GraphDatabaseFactory.java:70)
      at HelloWorld.createDataBase(HelloWorld.java:35)
      at HelloWorld.main(HelloWorld.java:28)
  Caused by: org.neo4j.kernel.lifecycle.LifecycleException: Component 'org.neo4j.kernel.extension.KernelExtensions@1304421' failed to initialize. Please see attached cause exception.
      at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.init(LifeSupport.java:489)
      at org.neo4j.kernel.lifecycle.LifeSupport.init(LifeSupport.java:72)
      at org.neo4j.kernel.lifecycle.LifeSupport.start(LifeSupport.java:106)
      at org.neo4j.kernel.InternalAbstractGraphDatabase.run(InternalAbstractGraphDatabase.java:335)
      ... 6 more
  Caused by: java.lang.NoClassDefFoundError: org/apache/lucene/store/Directory
      at org.neo4j.kernel.api.impl.index.DirectoryFactory.&lt;clinit&gt;(DirectoryFactory.java:53)
      at org.neo4j.kernel.api.impl.index.LuceneKernelExtensions.directoryFactory(LuceneKernelExtensions.java:36)
      at org.neo4j.kernel.api.impl.index.LuceneLabelScanStoreExtension.newKernelExtension(LuceneLabelScanStoreExtension.java:71)
      at org.neo4j.kernel.api.impl.index.LuceneLabelScanStoreExtension.newKernelExtension(LuceneLabelScanStoreExtension.java:39)
      at org.neo4j.kernel.extension.KernelExtensions.init(KernelExtensions.java:104)
      at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.init(LifeSupport.java:483)
      ... 9 more
  Caused by: java.lang.ClassNotFoundException: org.apache.lucene.store.Directory
      at java.net.URLClassLoader$1.run(Unknown Source)
      at java.net.URLClassLoader$1.run(Unknown Source)
      at java.security.AccessController.doPrivileged(Native Method)
      at java.net.URLClassLoader.findClass(Unknown Source)
      at java.lang.ClassLoader.loadClass(Unknown Source)
      at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
      at java.lang.ClassLoader.loadClass(Unknown Source)
      ... 15 more
  
  
  I don't know where the problem comes from, knowing that I install all NEO4j jars needed.
  
      enter code here
  
  Thank you all
  </code></pre>