diff --git a/java/ql/lib/semmle/code/java/environment/SystemProperty.qll b/java/ql/lib/semmle/code/java/environment/SystemProperty.qll
index 4fe04db60abe7..60a19a00f77ef 100644
--- a/java/ql/lib/semmle/code/java/environment/SystemProperty.qll
+++ b/java/ql/lib/semmle/code/java/environment/SystemProperty.qll
@@ -1,3 +1,7 @@
+/**
+ * Provides classes and predicates for working with java system properties.
+ */
+
 import java
 private import semmle.code.java.dataflow.DataFlow
 private import semmle.code.java.frameworks.Properties
diff --git a/java/ql/lib/semmle/code/java/frameworks/Properties.qll b/java/ql/lib/semmle/code/java/frameworks/Properties.qll
index a98c9a88c36b1..35640c52edf17 100644
--- a/java/ql/lib/semmle/code/java/frameworks/Properties.qll
+++ b/java/ql/lib/semmle/code/java/frameworks/Properties.qll
@@ -2,10 +2,14 @@
 import semmle.code.java.Type
 private import semmle.code.java.dataflow.FlowSteps
 
+/**
+ * The `java.util.Properties` class.
+ */
 class TypeProperty extends Class {
   TypeProperty() { hasQualifiedName("java.util", "Properties") }
 }
 
+/** The `getProperty` method of the class `java.util.Properties`. */
 class PropertiesGetPropertyMethod extends ValuePreservingMethod {
   PropertiesGetPropertyMethod() {
     getDeclaringType() instanceof TypeProperty and
@@ -15,6 +19,7 @@ class PropertiesGetPropertyMethod extends ValuePreservingMethod {
   override predicate returnsValue(int arg) { arg = 1 }
 }
 
+/** The `get` method of the class `java.util.Properties`. */
 class PropertiesGetMethod extends Method {
   PropertiesGetMethod() {
     getDeclaringType() instanceof TypeProperty and
@@ -22,6 +27,7 @@ class PropertiesGetMethod extends Method {
   }
 }
 
+/** The `setProperty` method of the class `java.util.Properties`. */
 class PropertiesSetPropertyMethod extends Method {
   PropertiesSetPropertyMethod() {
     getDeclaringType() instanceof TypeProperty and
@@ -29,6 +35,9 @@ class PropertiesSetPropertyMethod extends Method {
   }
 }
 
+/** 
+ * The methods of the class `java.util.Properties` that write the contents to an output.
+ */
 class PropertiesStoreMethod extends Method {
   PropertiesStoreMethod() {
     getDeclaringType() instanceof TypeProperty and
diff --git a/java/ql/src/Security/CWE/CWE-200/TempDirLocalInformationDisclosure.ql b/java/ql/src/Security/CWE/CWE-200/TempDirLocalInformationDisclosure.ql
index 3e94d3222191b..5992ca11fd4af 100644
--- a/java/ql/src/Security/CWE/CWE-200/TempDirLocalInformationDisclosure.ql
+++ b/java/ql/src/Security/CWE/CWE-200/TempDirLocalInformationDisclosure.ql
@@ -177,9 +177,7 @@ private class TempDirSystemGetPropertyDirectlyToMkdirConfig extends TaintTrackin
   }
 
   override predicate isSource(DataFlow::Node node) {
-    exists(
-      ExprSystemGetPropertyTempDirTainted propertyGetExpr, DataFlow::Node callSite
-    |
+    exists(ExprSystemGetPropertyTempDirTainted propertyGetExpr, DataFlow::Node callSite |
       DataFlow::localFlow(DataFlow::exprNode(propertyGetExpr), callSite)
     |
       isFileConstructorArgument(callSite.asExpr(), node.asExpr(), 1)
diff --git a/java/ql/test/library-tests/os/specific-unix-variant-test.ql b/java/ql/test/library-tests/os/specific-unix-variant-test.ql
index 6f975ecc0ff87..9343f3c6ad224 100644
--- a/java/ql/test/library-tests/os/specific-unix-variant-test.ql
+++ b/java/ql/test/library-tests/os/specific-unix-variant-test.ql
@@ -2,4 +2,4 @@ import default
 import semmle.code.java.os.OSCheck
 
 from IsSpecificUnixVariant isAnyUnix
-select isAnyUnix
\ No newline at end of file
+select isAnyUnix
diff --git a/java/ql/test/library-tests/os/specific-windows-variant-test.ql b/java/ql/test/library-tests/os/specific-windows-variant-test.ql
index 11371db55b4b0..fed895e389afa 100644
--- a/java/ql/test/library-tests/os/specific-windows-variant-test.ql
+++ b/java/ql/test/library-tests/os/specific-windows-variant-test.ql
@@ -2,4 +2,4 @@ import default
 import semmle.code.java.os.OSCheck
 
 from IsSpecificWindowsVariant isAnyWindows
-select isAnyWindows
\ No newline at end of file
+select isAnyWindows
diff --git a/java/ql/test/library-tests/os/unix-test.ql b/java/ql/test/library-tests/os/unix-test.ql
index b2b48d2df7e6f..83f0bc01ccf36 100644
--- a/java/ql/test/library-tests/os/unix-test.ql
+++ b/java/ql/test/library-tests/os/unix-test.ql
@@ -2,4 +2,4 @@ import default
 import semmle.code.java.os.OSCheck
 
 from IsUnixGuard isUnix
-select isUnix
\ No newline at end of file
+select isUnix
diff --git a/java/ql/test/library-tests/os/windows-test.ql b/java/ql/test/library-tests/os/windows-test.ql
index 4027d6da8a1e1..17481a186c365 100644
--- a/java/ql/test/library-tests/os/windows-test.ql
+++ b/java/ql/test/library-tests/os/windows-test.ql
@@ -2,4 +2,4 @@ import default
 import semmle.code.java.os.OSCheck
 
 from IsWindowsGuard isWindows
-select isWindows
\ No newline at end of file
+select isWindows