diff --git a/scm-core/src/main/java/sonia/scm/plugin/PluginCondition.java b/scm-core/src/main/java/sonia/scm/plugin/PluginCondition.java
index 479c6be9a5..ad6ba84875 100644
--- a/scm-core/src/main/java/sonia/scm/plugin/PluginCondition.java
+++ b/scm-core/src/main/java/sonia/scm/plugin/PluginCondition.java
@@ -236,7 +236,7 @@ public class PluginCondition implements Cloneable, Serializable
     if (Util.isNotEmpty(minVersion) && Util.isNotEmpty(version))
     {
       supported = (minVersion.equalsIgnoreCase(version)
-        || new Version(version).isNewer(minVersion));
+        || Version.parse(version).isNewer(minVersion));
     }
 
     if (supported && Util.isNotEmpty(this.os) && Util.isNotEmpty(os))
diff --git a/scm-core/src/main/java/sonia/scm/version/Version.java b/scm-core/src/main/java/sonia/scm/version/Version.java
index 09efe75cb8..96f7a9ff07 100644
--- a/scm-core/src/main/java/sonia/scm/version/Version.java
+++ b/scm-core/src/main/java/sonia/scm/version/Version.java
@@ -39,35 +39,26 @@ import com.google.common.base.Objects;
 import com.google.common.base.Preconditions;
 import com.google.common.collect.ComparisonChain;
 
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
 //~--- JDK imports ------------------------------------------------------------
 
 import java.util.Locale;
 
 /**
  * Version object for comparing and parsing versions.
- * 
+ *
  *
  * @author Sebastian Sdorra
  */
 public final class Version implements Comparable<Version>
 {
 
-  /** the logger for Version */
-  private static final Logger logger =
-    LoggerFactory.getLogger(Version.class);
-
-  //~--- constructors ---------------------------------------------------------
-
   /**
    * Constructs a new version object
    *
    *
    * @param versionString string representation of the version
    */
-  public Version(String versionString)
+  private Version(String versionString)
   {
     this.unparsedVersion = versionString;
 
@@ -101,14 +92,11 @@ public final class Version implements Comparable<Version>
   /**
    * Creates a new version of the given string.
    *
-   * TODO throw exception if not parseable
-   *
-   *
    * @param versionString string representation of the version
    *
    * @return version object
    */
-  public static Version createVersion(String versionString)
+  public static Version parse(String versionString)
   {
     Version version = null;
 
@@ -118,10 +106,8 @@ public final class Version implements Comparable<Version>
     }
     catch (NumberFormatException ex)
     {
-      if (logger.isWarnEnabled())
-      {
-        logger.warn("could not parse version ".concat(versionString), ex);
-      }
+      throw new VersionParseException(
+        "could not parse version ".concat(versionString), ex);
     }
 
     return version;
@@ -166,8 +152,7 @@ public final class Version implements Comparable<Version>
     final Version other = (Version) obj;
 
     return Objects.equal(major, other.major)
-      && Objects.equal(minor, other.minor)
-      && Objects.equal(patch, other.patch)
+      && Objects.equal(minor, other.minor) && Objects.equal(patch, other.patch)
       && Objects.equal(type, other.type)
       && Objects.equal(typeVersion, other.typeVersion)
       && Objects.equal(snapshot, other.snapshot)
@@ -180,8 +165,8 @@ public final class Version implements Comparable<Version>
   @Override
   public int hashCode()
   {
-    return Objects.hashCode(major, minor, patch, type, typeVersion,
-      snapshot, parsedVersion);
+    return Objects.hashCode(major, minor, patch, type, typeVersion, snapshot,
+      parsedVersion);
   }
 
   /**
@@ -195,17 +180,6 @@ public final class Version implements Comparable<Version>
 
   //~--- get methods ----------------------------------------------------------
 
-  /**
-   * Returns the patch part of the version.
-   *
-   *
-   * @return patch part
-   */
-  public int getPatch()
-  {
-    return patch;
-  }
-
   /**
    * Returns the major part of the version.
    *
@@ -239,6 +213,17 @@ public final class Version implements Comparable<Version>
     return parsedVersion;
   }
 
+  /**
+   * Returns the patch part of the version.
+   *
+   *
+   * @return patch part
+   */
+  public int getPatch()
+  {
+    return patch;
+  }
+
   /**
    * Returns the version type (alpha, beta, milestone, etc.) of the version.
    *
@@ -273,7 +258,7 @@ public final class Version implements Comparable<Version>
   }
 
   /**
-   * Returns true if the current version is newer than the given version.
+   * Returns true if the given version is newer.
    *
    * @param o other version
    *
@@ -285,7 +270,7 @@ public final class Version implements Comparable<Version>
   }
 
   /**
-   * Returns true if the current version is newer than the given version.
+   * Returns true if the given version is newer.
    *
    *
    * @param versionString other version
@@ -294,13 +279,13 @@ public final class Version implements Comparable<Version>
    */
   public boolean isNewer(String versionString)
   {
-    Version o = Version.createVersion(versionString);
+    Version o = Version.parse(versionString);
 
     return (o != null) && isNewer(o);
   }
 
   /**
-   * Returns true if the current version is older than the given version.
+   * Returns true if the given version is older.
    *
    *
    * @param o other version
@@ -313,7 +298,7 @@ public final class Version implements Comparable<Version>
   }
 
   /**
-   * Returns true if the current version is older than the given version.
+   * Returns true if the given version is older.
    *
    *
    * @param versionString other version
@@ -322,7 +307,7 @@ public final class Version implements Comparable<Version>
    */
   public boolean isOlder(String versionString)
   {
-    Version o = Version.createVersion(versionString);
+    Version o = Version.parse(versionString);
 
     return (o != null) && isOlder(o);
   }
@@ -478,15 +463,15 @@ public final class Version implements Comparable<Version>
   /** unparsed version */
   private final String unparsedVersion;
 
-  /** patch part */
-  private int patch = 0;
-
   /** major part */
   private int major = 0;
 
   /** minor part */
   private int minor = 0;
 
+  /** patch part */
+  private int patch = 0;
+
   /** is a snapshot */
   private boolean snapshot;
 
diff --git a/scm-core/src/main/java/sonia/scm/version/VersionParseException.java b/scm-core/src/main/java/sonia/scm/version/VersionParseException.java
new file mode 100644
index 0000000000..9db6013dfb
--- /dev/null
+++ b/scm-core/src/main/java/sonia/scm/version/VersionParseException.java
@@ -0,0 +1,83 @@
+/**
+ * Copyright (c) 2010, Sebastian Sdorra All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer. 2. Redistributions in
+ * binary form must reproduce the above copyright notice, this list of
+ * conditions and the following disclaimer in the documentation and/or other
+ * materials provided with the distribution. 3. Neither the name of SCM-Manager;
+ * nor the names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * http://bitbucket.org/sdorra/scm-manager
+ *
+ */
+
+
+
+package sonia.scm.version;
+
+/**
+ * The VersionParseException is thrown if a version could not be parsed.
+ *
+ * @author Sebastian Sdorra
+ * 
+ * @since 2.0.0
+ */
+public class VersionParseException extends RuntimeException
+{
+
+  /**
+   * Constructs a new VersionParseException.
+   *
+   */
+  public VersionParseException() {}
+
+  /**
+   * Constructs a new VersionParseException.
+   *
+   *
+   * @param message message of the exception
+   */
+  public VersionParseException(String message)
+  {
+    super(message);
+  }
+
+  /**
+   * Constructs a new VersionParseException.
+   *
+   *
+   * @param cause cause of the exception
+   */
+  public VersionParseException(Throwable cause)
+  {
+    super(cause);
+  }
+
+  /**
+   * Constructs a new VersionParseException.
+   *
+   *
+   * @param message message of the exception
+   * @param cause cause of the exception
+   */
+  public VersionParseException(String message, Throwable cause)
+  {
+    super(message, cause);
+  }
+}
diff --git a/scm-core/src/test/java/sonia/scm/version/VersionTest.java b/scm-core/src/test/java/sonia/scm/version/VersionTest.java
index eb9b79dd6c..a0f3af85d1 100644
--- a/scm-core/src/test/java/sonia/scm/version/VersionTest.java
+++ b/scm-core/src/test/java/sonia/scm/version/VersionTest.java
@@ -57,7 +57,7 @@ public class VersionTest
   @Test
   public void parseSimpleVersion()
   {
-    Version v = new Version("1.0");
+    Version v = Version.parse("1.0");
 
     assertTrue(v.getMajor() == 1);
     assertTrue(v.getMinor() == 0);
@@ -67,7 +67,7 @@ public class VersionTest
     assertEquals(v.getParsedVersion(), "1.0.0");
 
     // test with snapshot
-    v = new Version("1.1-SNAPSHOT");
+    v = Version.parse("1.1-SNAPSHOT");
     assertTrue(v.getMajor() == 1);
     assertTrue(v.getMinor() == 1);
     assertTrue(v.getPatch() == 0);
@@ -76,7 +76,7 @@ public class VersionTest
     assertEquals(v.getParsedVersion(), "1.1.0-SNAPSHOT");
 
     // test with maintenance
-    v = new Version("2.3.14");
+    v = Version.parse("2.3.14");
     assertTrue(v.getMajor() == 2);
     assertTrue(v.getMinor() == 3);
     assertTrue(v.getPatch() == 14);
@@ -92,7 +92,7 @@ public class VersionTest
   @Test
   public void parseTypeVersions()
   {
-    Version v = new Version("1.0-alpha");
+    Version v = Version.parse("1.0-alpha");
 
     assertTrue(v.getMajor() == 1);
     assertTrue(v.getMinor() == 0);
@@ -103,7 +103,7 @@ public class VersionTest
     assertEquals(v.getParsedVersion(), "1.0.0-alpha1");
 
     // Test release candidate
-    v = new Version("2.1.2-RC3");
+    v = Version.parse("2.1.2-RC3");
     assertTrue(v.getMajor() == 2);
     assertTrue(v.getMinor() == 1);
     assertTrue(v.getPatch() == 2);
@@ -122,15 +122,15 @@ public class VersionTest
   {
     Version[] versions = new Version[9];
 
-    versions[0] = Version.createVersion("2.3.1-SNAPSHOT");
-    versions[1] = Version.createVersion("2.3.1-beta1");
-    versions[2] = Version.createVersion("2.3.1-beta2");
-    versions[3] = Version.createVersion("2.3.1-M1");
-    versions[4] = Version.createVersion("2.3.1-alpha2");
-    versions[5] = Version.createVersion("2.3.1-RC1");
-    versions[6] = Version.createVersion("2.3.1");
-    versions[7] = Version.createVersion("2.3");
-    versions[8] = Version.createVersion("2.4.6");
+    versions[0] = Version.parse("2.3.1-SNAPSHOT");
+    versions[1] = Version.parse("2.3.1-beta1");
+    versions[2] = Version.parse("2.3.1-beta2");
+    versions[3] = Version.parse("2.3.1-M1");
+    versions[4] = Version.parse("2.3.1-alpha2");
+    versions[5] = Version.parse("2.3.1-RC1");
+    versions[6] = Version.parse("2.3.1");
+    versions[7] = Version.parse("2.3");
+    versions[8] = Version.parse("2.4.6");
     Arrays.sort(versions);
     assertEquals(versions[0].getParsedVersion(), "2.4.6");
     assertEquals(versions[1].getParsedVersion(), "2.3.1");
@@ -150,9 +150,9 @@ public class VersionTest
   @Test
   public void testIsNewer()
   {
-    assertFalse(Version.createVersion("1.0").isNewer("1.0.1"));
-    assertTrue(Version.createVersion("1.1").isNewer("1.1-alpha1"));
-    assertTrue(Version.createVersion("1.1").isNewer("1.1-RC5"));
+    assertFalse(Version.parse("1.0").isNewer("1.0.1"));
+    assertTrue(Version.parse("1.1").isNewer("1.1-alpha1"));
+    assertTrue(Version.parse("1.1").isNewer("1.1-RC5"));
   }
 
   /**
@@ -162,8 +162,18 @@ public class VersionTest
   @Test
   public void testIsOlder()
   {
-    assertFalse(Version.createVersion("1.0.1").isOlder("1.0"));
-    assertTrue(Version.createVersion("1.1-alpha1").isOlder("1.1"));
-    assertTrue(Version.createVersion("1.1-RC5").isOlder("1.1"));
+    assertFalse(Version.parse("1.0.1").isOlder("1.0"));
+    assertTrue(Version.parse("1.1-alpha1").isOlder("1.1"));
+    assertTrue(Version.parse("1.1-RC5").isOlder("1.1"));
+  }
+
+  /**
+   * Method description
+   *
+   */
+  @Test(expected = VersionParseException.class)
+  public void testUnparseable()
+  {
+    Version.parse("aaaa");
   }
 }
diff --git a/scm-plugin-backend/src/main/java/sonia/scm/plugin/PluginInformationVersionComparator.java b/scm-plugin-backend/src/main/java/sonia/scm/plugin/PluginInformationVersionComparator.java
index 75ace83a9b..4d8af895aa 100644
--- a/scm-plugin-backend/src/main/java/sonia/scm/plugin/PluginInformationVersionComparator.java
+++ b/scm-plugin-backend/src/main/java/sonia/scm/plugin/PluginInformationVersionComparator.java
@@ -35,6 +35,7 @@ package sonia.scm.plugin;
 
 //~--- non-JDK imports --------------------------------------------------------
 
+import sonia.scm.version.Version;
 import sonia.scm.util.Util;
 
 //~--- JDK imports ------------------------------------------------------------
@@ -73,8 +74,8 @@ public class PluginInformationVersionComparator
 
     if (Util.isNotEmpty(v1) && Util.isNotEmpty(v2))
     {
-      if (PluginVersion.createVersion(v1).isNewer(
-        PluginVersion.createVersion(v2)))
+      if (Version.parse(v1).isNewer(
+        Version.parse(v2)))
       {
         result = -1;
       }
diff --git a/scm-plugin-backend/src/main/java/sonia/scm/plugin/rest/PluginInformationComparator.java b/scm-plugin-backend/src/main/java/sonia/scm/plugin/rest/PluginInformationComparator.java
index 3f2d72d42b..487dfb98e8 100644
--- a/scm-plugin-backend/src/main/java/sonia/scm/plugin/rest/PluginInformationComparator.java
+++ b/scm-plugin-backend/src/main/java/sonia/scm/plugin/rest/PluginInformationComparator.java
@@ -36,7 +36,7 @@ package sonia.scm.plugin.rest;
 //~--- non-JDK imports --------------------------------------------------------
 
 import sonia.scm.plugin.PluginInformation;
-import sonia.scm.plugin.PluginVersion;
+import sonia.scm.version.Version;
 
 //~--- JDK imports ------------------------------------------------------------
 
@@ -76,10 +76,10 @@ public class PluginInformationComparator
 
       if (c == 0)
       {
-        PluginVersion version =
-          PluginVersion.createVersion(plugin.getVersion());
-        PluginVersion otherVersion =
-          PluginVersion.createVersion(otherPlugin.getVersion());
+        Version version =
+          Version.parse(plugin.getVersion());
+        Version otherVersion =
+          Version.parse(otherPlugin.getVersion());
 
         c = version.compareTo(otherVersion);
       }
diff --git a/scm-plugin-backend/src/main/java/sonia/scm/plugin/rest/api/PluginResource.java b/scm-plugin-backend/src/main/java/sonia/scm/plugin/rest/api/PluginResource.java
index 01ad3aea12..94e4043c74 100644
--- a/scm-plugin-backend/src/main/java/sonia/scm/plugin/rest/api/PluginResource.java
+++ b/scm-plugin-backend/src/main/java/sonia/scm/plugin/rest/api/PluginResource.java
@@ -50,7 +50,7 @@ import sonia.scm.plugin.PluginBackend;
 import sonia.scm.plugin.PluginBackendListener;
 import sonia.scm.plugin.PluginCenter;
 import sonia.scm.plugin.PluginInformation;
-import sonia.scm.plugin.PluginVersion;
+import sonia.scm.version.Version;
 import sonia.scm.plugin.rest.PluginInformationComparator;
 
 //~--- JDK imports ------------------------------------------------------------
@@ -264,7 +264,7 @@ public class PluginResource implements PluginBackendListener
    */
   private boolean isNewer(PluginInformation plugin, PluginInformation newest)
   {
-    return new PluginVersion(plugin.getVersion()).isNewer(newest.getVersion());
+    return Version.parse(plugin.getVersion()).isNewer(newest.getVersion());
   }
 
   /**
diff --git a/scm-webapp/src/main/java/sonia/scm/plugin/DefaultPluginManager.java b/scm-webapp/src/main/java/sonia/scm/plugin/DefaultPluginManager.java
index 94ef21fd3c..d317155a2a 100644
--- a/scm-webapp/src/main/java/sonia/scm/plugin/DefaultPluginManager.java
+++ b/scm-webapp/src/main/java/sonia/scm/plugin/DefaultPluginManager.java
@@ -35,6 +35,7 @@ package sonia.scm.plugin;
 
 //~--- non-JDK imports --------------------------------------------------------
 
+import sonia.scm.version.Version;
 import com.github.legman.Subscribe;
 
 import com.google.common.collect.Sets;
@@ -721,7 +722,7 @@ public class DefaultPluginManager implements PluginManager
     PluginInformation installed)
   {
     boolean result = false;
-    PluginVersion version = PluginVersion.createVersion(available.getVersion());
+    Version version = Version.parse(available.getVersion());
 
     if (version != null)
     {
diff --git a/scm-webapp/src/main/java/sonia/scm/upgrade/ClientDateFormatUpgradeHandler.java b/scm-webapp/src/main/java/sonia/scm/upgrade/ClientDateFormatUpgradeHandler.java
index 6e4d4f7e03..5b8301960e 100644
--- a/scm-webapp/src/main/java/sonia/scm/upgrade/ClientDateFormatUpgradeHandler.java
+++ b/scm-webapp/src/main/java/sonia/scm/upgrade/ClientDateFormatUpgradeHandler.java
@@ -44,7 +44,7 @@ import org.w3c.dom.Node;
 import org.w3c.dom.NodeList;
 
 import sonia.scm.SCMContext;
-import sonia.scm.plugin.PluginVersion;
+import sonia.scm.version.Version;
 
 //~--- JDK imports ------------------------------------------------------------
 
@@ -79,7 +79,7 @@ public class ClientDateFormatUpgradeHandler extends XmlUpgradeHandler
    */
   @Override
   public void doUpgrade(File homeDirectory, File configDirectory,
-    PluginVersion oldVersion, PluginVersion newVersion)
+    Version oldVersion, Version newVersion)
   {
     if (oldVersion.isOlder("1.23"))
     {
diff --git a/scm-webapp/src/main/java/sonia/scm/upgrade/TimestampUpgradeHandler.java b/scm-webapp/src/main/java/sonia/scm/upgrade/TimestampUpgradeHandler.java
index 66ed6d78a4..85328111fa 100644
--- a/scm-webapp/src/main/java/sonia/scm/upgrade/TimestampUpgradeHandler.java
+++ b/scm-webapp/src/main/java/sonia/scm/upgrade/TimestampUpgradeHandler.java
@@ -46,7 +46,7 @@ import org.w3c.dom.NodeList;
 import org.xml.sax.SAXException;
 
 import sonia.scm.SCMContext;
-import sonia.scm.plugin.PluginVersion;
+import sonia.scm.version.Version;
 import sonia.scm.util.IOUtil;
 import sonia.scm.util.Util;
 
@@ -90,7 +90,7 @@ public class TimestampUpgradeHandler extends XmlUpgradeHandler
    */
   @Override
   public void doUpgrade(File homeDirectory, File configDirectory,
-    PluginVersion oldVersion, PluginVersion newVersion)
+    Version oldVersion, Version newVersion)
   {
     if (oldVersion.isOlder("1.2"))
     {
diff --git a/scm-webapp/src/main/java/sonia/scm/upgrade/UpgradeManager.java b/scm-webapp/src/main/java/sonia/scm/upgrade/UpgradeManager.java
index bbc0268388..9b34091f25 100644
--- a/scm-webapp/src/main/java/sonia/scm/upgrade/UpgradeManager.java
+++ b/scm-webapp/src/main/java/sonia/scm/upgrade/UpgradeManager.java
@@ -44,7 +44,7 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import sonia.scm.SCMContext;
-import sonia.scm.plugin.PluginVersion;
+import sonia.scm.version.Version;
 import sonia.scm.util.IOUtil;
 
 //~--- JDK imports ------------------------------------------------------------
@@ -164,8 +164,8 @@ public class UpgradeManager
 
     try
     {
-      PluginVersion oldVersion = PluginVersion.createVersion(oldVersionString);
-      PluginVersion newVersion = PluginVersion.createVersion(newVersionString);
+      Version oldVersion = Version.parse(oldVersionString);
+      Version newVersion = Version.parse(newVersionString);
 
       doUpgradesForOldVersion(baseDirectory, configDirectory, oldVersion,
         newVersion);
@@ -190,7 +190,7 @@ public class UpgradeManager
    * @param newVersion
    */
   private void doUpgradesForOldVersion(File baseDirectory,
-    File configDirectory, PluginVersion oldVersion, PluginVersion newVersion)
+    File configDirectory, Version oldVersion, Version newVersion)
   {
     List<UpgradeHandler> upgradeHandlers = collectUpgradeHandlers();