diff --git a/lint/src/test/kotlin/LinterTest.java b/lint/src/test/kotlin/LinterTest.kt
similarity index 100%
rename from lint/src/test/kotlin/LinterTest.java
rename to lint/src/test/kotlin/LinterTest.kt
diff --git a/prettyprinting/src/main/kotlin/mlpp/FeatureExtractor.java b/prettyprinting/src/main/kotlin/mlpp/FeatureExtractor.kt
similarity index 100%
rename from prettyprinting/src/main/kotlin/mlpp/FeatureExtractor.java
rename to prettyprinting/src/main/kotlin/mlpp/FeatureExtractor.kt
diff --git a/smt/src/test/kotlin/SmtTest.java b/smt/src/test/kotlin/SmtTest.kt
similarity index 100%
rename from smt/src/test/kotlin/SmtTest.java
rename to smt/src/test/kotlin/SmtTest.kt
diff --git a/xpath/src/main/kotlin/xpath/AttribModifier.java b/xpath/src/main/kotlin/io/github/jmltoolkit/xpath/AttribModifier.kt
similarity index 100%
rename from xpath/src/main/kotlin/xpath/AttribModifier.java
rename to xpath/src/main/kotlin/io/github/jmltoolkit/xpath/AttribModifier.kt
diff --git a/xpath/src/main/kotlin/xpath/AttribNodeWithName.java b/xpath/src/main/kotlin/io/github/jmltoolkit/xpath/AttribNodeWithName.kt
similarity index 100%
rename from xpath/src/main/kotlin/xpath/AttribNodeWithName.java
rename to xpath/src/main/kotlin/io/github/jmltoolkit/xpath/AttribNodeWithName.kt
diff --git a/xpath/src/main/kotlin/xpath/DocumentFactories.java b/xpath/src/main/kotlin/io/github/jmltoolkit/xpath/DocumentFactories.kt
similarity index 100%
rename from xpath/src/main/kotlin/xpath/DocumentFactories.java
rename to xpath/src/main/kotlin/io/github/jmltoolkit/xpath/DocumentFactories.kt
diff --git a/xpath/src/main/kotlin/xpath/JPAttr.java b/xpath/src/main/kotlin/io/github/jmltoolkit/xpath/JPAttr.kt
similarity index 100%
rename from xpath/src/main/kotlin/xpath/JPAttr.java
rename to xpath/src/main/kotlin/io/github/jmltoolkit/xpath/JPAttr.kt
diff --git a/xpath/src/main/kotlin/xpath/JPAttrPseudo.java b/xpath/src/main/kotlin/io/github/jmltoolkit/xpath/JPAttrPseudo.kt
similarity index 100%
rename from xpath/src/main/kotlin/xpath/JPAttrPseudo.java
rename to xpath/src/main/kotlin/io/github/jmltoolkit/xpath/JPAttrPseudo.kt
diff --git a/xpath/src/main/kotlin/xpath/JPDocument.java b/xpath/src/main/kotlin/io/github/jmltoolkit/xpath/JPDocument.kt
similarity index 100%
rename from xpath/src/main/kotlin/xpath/JPDocument.java
rename to xpath/src/main/kotlin/io/github/jmltoolkit/xpath/JPDocument.kt
diff --git a/xpath/src/main/kotlin/xpath/JPElement.java b/xpath/src/main/kotlin/io/github/jmltoolkit/xpath/JPElement.kt
similarity index 100%
rename from xpath/src/main/kotlin/xpath/JPElement.java
rename to xpath/src/main/kotlin/io/github/jmltoolkit/xpath/JPElement.kt
diff --git a/xpath/src/main/kotlin/xpath/JPRootElement.java b/xpath/src/main/kotlin/io/github/jmltoolkit/xpath/JPRootElement.kt
similarity index 100%
rename from xpath/src/main/kotlin/xpath/JPRootElement.java
rename to xpath/src/main/kotlin/io/github/jmltoolkit/xpath/JPRootElement.kt
diff --git a/xpath/src/main/kotlin/xpath/PseudoAttributeHelper.java b/xpath/src/main/kotlin/io/github/jmltoolkit/xpath/PseudoAttributeHelper.kt
similarity index 100%
rename from xpath/src/main/kotlin/xpath/PseudoAttributeHelper.java
rename to xpath/src/main/kotlin/io/github/jmltoolkit/xpath/PseudoAttributeHelper.kt
diff --git a/xpath/src/main/kotlin/xpath/PseudoAttributeProvider.java b/xpath/src/main/kotlin/io/github/jmltoolkit/xpath/PseudoAttributeProvider.kt
similarity index 100%
rename from xpath/src/main/kotlin/xpath/PseudoAttributeProvider.java
rename to xpath/src/main/kotlin/io/github/jmltoolkit/xpath/PseudoAttributeProvider.kt
diff --git a/xpath/src/main/kotlin/xpath/XPathFacade.java b/xpath/src/main/kotlin/io/github/jmltoolkit/xpath/XPathFacade.kt
similarity index 100%
rename from xpath/src/main/kotlin/xpath/XPathFacade.java
rename to xpath/src/main/kotlin/io/github/jmltoolkit/xpath/XPathFacade.kt
diff --git a/xpath/src/main/kotlin/xpath/package-info.java b/xpath/src/main/kotlin/io/github/jmltoolkit/xpath/package-info.kt
similarity index 100%
rename from xpath/src/main/kotlin/xpath/package-info.java
rename to xpath/src/main/kotlin/io/github/jmltoolkit/xpath/package-info.kt