.

res/header.tex

@@ -0,0 +1,8 @@
+\usepackage{float}
+\let\origfigure\figure
+\let\endorigfigure\endfigure
+\renewenvironment{figure}[1][2] {
+    \expandafter\origfigure\expandafter[H]
+} {
+    \endorigfigure
+}

res/plantuml.cfg

@@ -1,4 +1,4 @@
-!theme materia
+!theme carbon-gray
 skinparam dpi 300
 skinparam backgroundColor #FFFFFF
 skinparam defaultFontName "NotoSansSC"