Add file header comments to CMake files (#5688)

java/src/hdf/hdf5lib/CMakeLists.txt

@@ -1,3 +1,9 @@
+#-----------------------------------------------------------------------------
+# CMake configuration for HDF5 Java hdf.hdf5lib package
+# This file sets up the build, packaging, and installation rules for the HDF5 Java hdf.hdf5lib package.
+# It handles Java source grouping, JAR creation, JNI dependencies, and formatting for the HDF5 Java bindings.
+#-----------------------------------------------------------------------------
+
 cmake_minimum_required (VERSION 3.18)
 project (HDF5_JAVA_HDF_HDF5 Java)
 

java/src/jni/CMakeLists.txt

@@ -1,3 +1,9 @@
+#-----------------------------------------------------------------------------
+# CMake configuration for HDF5 Java JNI library
+# This file sets up the build, formatting, and installation rules for the HDF5 Java JNI shared library.
+# It handles JNI C/C++ source and header definitions, compiler options, linking, export, and integration with the HDF5 shared library for Java bindings.
+#-----------------------------------------------------------------------------
+
 cmake_minimum_required (VERSION 3.18)
 project (HDF5_JAVA_JNI C)
 

java/test/CMakeLists.txt

@@ -1,3 +1,10 @@
+#-----------------------------------------------------------------------------
+# CMake configuration for HDF5 Java test suite
+# This file sets up the build, and test execution rules for the HDF5 Java test suite.
+# It handles Java test source grouping, JAR creation, test data management, test execution (including VOL tests),
+# and integration with the HDF5 Java JNI and core libraries.
+#-----------------------------------------------------------------------------
+
 cmake_minimum_required (VERSION 3.18)
 project (HDF5_JAVA_TEST Java)